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{{Short description|Fad diet based on the presumed diet of Paleolithic humans}} | ||
{{About|a modern-day diet|information on the dietary practices of Paleolithic humans|Paleolithic#Diet and nutrition}} | |||
{{POV|date=February 2009}} | |||
{{Use dmy dates|date=January 2016}} | |||
] | |||
] | |||
The '''Paleolithic diet''', '''Paleo diet''', '''caveman diet''', or '''Stone Age diet''' is a modern ] consisting of foods thought by its proponents to mirror those eaten by humans during the ] era.<ref>{{Harvnb|de Menezes|Sampaio|Carioca|Parente|2019}}: "The Paleolithic diet has been gaining ground in the field of fad diets. It is based on food patterns of human Paleolithic ancestors, about 2.6 million to 10,000 years ago, a period that precedes the advent of industrial agriculture and is different from today's modern society".</ref> | |||
The modern ] known as the '''Paleolithic diet''' (abbreviated '''paleo diet''' or '''paleodiet'''), also popularly referred to as the '''caveman diet''', '''Stone Age diet''' and '''hunter-gatherer diet''', is a ]al plan based on the presumed ancient diet of wild plants and animals that various human species habitually consumed during the ]—a period of about 2.5 million years duration that ended around 10,000 years ago with the development of agriculture. In common usage, such terms as the "Paleolithic diet" also refer to the actual ancestral human diet.<ref name=doi:10.1080/11026480510032043> | |||
{{cite journal | |||
| author = Lindeberg, Staffan | |||
| title = Palaeolithic diet ("stone age" diet) | |||
| journal = Scandinavian Journal of Food & Nutrition | |||
| volume = 49 | issue = 2 | pages = 75–7 | year = 2005 | month = June | |||
| doi = 10.1080/11026480510032043 | |||
| url = http://journals.sfu.ca/coaction/index.php/fnr/article/viewFile/1526/1394 }} | |||
</ref><ref name="doi10.1080/11026480510031990"> | |||
{{cite journal | |||
| author = Bryngelsson, Susanne; & Asp, Nils-Georg | |||
| title = Popular diets, body weight and health: What is scientifically documented? | |||
| journal = Scandinavian Journal of Food & Nutrition | |||
| volume = 49 | issue = 1 | pages = 15–20 | year = 2005 |month = March | |||
| doi = 10.1080/11026480510031990 | |||
| url = http://journals.sfu.ca/coaction/index.php/fnr/article/viewFile/1515/1383 }} | |||
</ref> | |||
Centered around commonly available modern foods, the "contemporary" Paleolithic diet consists mainly of lean meat, fish, vegetables, fruit, roots, and nuts; and excludes grains, legumes, dairy products, salt, refined sugar, and processed oils.<ref name=doi:10.1080/11026480510032043/><ref name=JAmNeutraceutAssoc2002;5:15-24> | |||
{{cite journal | |||
| author = Cordain, Loren | |||
| title = The nutritional characteristics of a contemporary diet based upon Paleolithic food groups | |||
| journal = Journal of the American Nutraceutical Association | |||
| volume = 5 | issue = 5 | pages = 15–24 | year = Summer 2002 | |||
| url = http://www.ana-jana.org/Journal/journals/ACF5FB7.pdf | format = PDF }} | |||
</ref><ref name=JNutriEnvironMed2003;13(3):149-160> | |||
{{cite journal | |||
| author = Lindeberg S, Cordain L, Eaton SB | |||
| title = Biological and clinical potential of a Paleolithic diet | |||
| journal = Journal of Nutritional and Environmental Medicine | |||
| volume = 13 | issue = 3 | pages = 149–60 | year = 2003 | month = September | |||
| doi = 10.1080/13590840310001619397 | |||
| url = http://www.thepaleodiet.com/articles/J%20Nutr%20Environ%20Med%202003.pdf | format=PDF }} | |||
</ref> | |||
The diet avoids ] and typically includes ], ], ]s, ], and ] and excludes ], ], ], ], processed ]s, ], ], and ].<ref>{{Harvnb| British Dietetic Association|2014}} - "The Paleo diet (also known as the Paleolithic Diet, the Caveman diet and the Stone Age Diet) is a diet where only foods presumed to be available to Neanderthals in the prehistoric era are consumed and all other foods, such as dairy products, grains, sugar, legumes, 'processed' oils, salt, and others like alcohol or coffee are excluded."</ref> Historians can trace the ideas behind the diet to "primitive" diets advocated in the 19th century. In the 1970s, ] popularized a meat-centric "Stone Age" diet; in the 21st century, the best-selling books of ] popularized the Paleo diet.<ref>{{Harvnb|Ask EN|2010}}; {{Harvnb|Johnson|2015}}; {{Harvnb|Fitzgerald|2014}}.</ref> {{asof|2019}} the paleo-diet industry was worth approximately {{USD|500|link=yes}} million.<ref>{{Harvnb|Decker|2019}}.</ref> | |||
First popularized in the mid 1970s by a ] named Walter L. Voegtlin,<ref name="isbn0533013143"> | |||
{{cite book | |||
| last = Voegtlin, Walter L. | |||
| title = The stone age diet: Based on in-depth studies of human ecology and the diet of man | |||
| year = 1975 | publisher = Vantage Press | |||
| isbn = 0533013143 }} | |||
</ref><ref name="article4919415.ece"> | |||
{{cite news | |||
| last = Smith, Emma | |||
| title = The Ray Mears caveman diet | |||
| work = ] | |||
| date = October 12, 2008 | |||
| url = http://www.timesonline.co.uk/tol/life_and_style/men/article4919415.ece | |||
| accessdate = November 1, 2008 }} | |||
</ref> | |||
this nutritional concept has been promoted and adapted by a number of authors and researchers in several books and academic journals.<ref name="pmid12494313"> | |||
{{cite journal | |||
| author = Richards, Michael P. | |||
| title = A brief review of the archaeological evidence for Palaeolithic and Neolithic subsistence | |||
| journal = European Journal of Clinical Nutrition | |||
| volume = 56 | issue = 12 | pages = 1270–78 | year = 2002 | month = December | |||
| pmid = 12494313 | doi = 10.1038/sj.ejcn.1601646 | |||
| url = http://www.nature.com/ejcn/journal/v56/n12/abs/1601646a.html }} | |||
</ref> | |||
A common theme in ],<ref name="pmid18791103"> | |||
{{cite journal | |||
| last = Naugler, Christopher T. | |||
| title = Evolutionary medicine: Update on the relevance to family practice | |||
| journal = ] | |||
| volume = 54 | issue = 9 | pages = 1265–9 | month = September 1 | year = 2008 | |||
| pmid = 18791103 | |||
| url = http://www.cfp.ca/cgi/content/full/54/9/1265 }} | |||
</ref><ref name="pmid11817903"> | |||
{{cite journal | |||
| author=Eaton SB, Strassman BI, ], ], ], ], Weder AB, Eaton SB 3rd, Lindeberg S, ], Mysterud I, Cordain L | |||
| title = Evolutionary health promotion | |||
| journal = Preventive Medicine | |||
| volume = 34 | issue = 2 | pages = 109–18 | year = 2002 | month = February | |||
| pmid = 11817903 | doi = 10.1006/pmed.2001.0876 | |||
| url = http://www.thepaleodiet.com/articles/Health%20Promotion%20Paper.pdf | format = PDF }} | |||
</ref> | |||
Paleolithic nutrition is based on the premise that ]s are genetically ] to the diet of their Paleolithic ancestors and that human ] have scarcely changed since the dawn of agriculture, and therefore that an ] for human health and well-being is one that resembles this ancestral diet.<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="pmid15699220"> | |||
{{cite journal | |||
| author = Cordain L, Eaton SB, Sebastian A, Mann N, Lindeberg S, Watkins BA, O'Keefe JH, Brand-Miller J | |||
| title = Origins and evolution of the Western diet: health implications for the 21st century | |||
| journal = American Journal of Clinical Nutrition |publisher=] | |||
| volume = 81 | issue = 2 | pages = 341–54 | year = 2005 | month = February 1 | |||
| pmid = 15699220 | |||
| url = http://www.ajcn.org/cgi/content/full/81/2/341 }} | |||
</ref> | |||
Proponents of this diet argue that modern human populations subsisting on ]s allegedly similar to those of Paleolithic ]s are largely free of ],<ref name="isbn007140239X"> | |||
{{cite book | |||
| author = Kligler, Benjamin & Lee, Roberta A. (eds.) | |||
| title = Integrative medicine | |||
| year = 2004 | publisher = ] | |||
| isbn = 007140239X | pages = 139–40 | |||
| chapter = Paleolithic diet | |||
| chapterurl = http://books.google.com/books?id=-JUcjUGBV6kC&pg=PA139&lpg=PA139&dq=environment+%22paleolithic+diet%22&source=web&ots=DtSWPqB2z6&sig=Zpbk072sJouGFh2ApjHafftTP4o#PPA139,M1}} | |||
</ref><ref name="pmid11817904"> | |||
{{cite journal | |||
| author = Eaton SB, Cordain L, Lindeberg S | |||
| title = Evolutionary Health Promotion: A consideration of common counter-arguments | |||
| journal = Preventive Medicine | |||
| volume = 34 | issue = 2 | pages = 119–23 | year = 2002 | month = February | |||
| pmid = 11817904 | doi = 10.1006/pmed.2001.0966 | |||
| url = http://www.thepaleodiet.com/articles/Counter%20Arguments%20Paper.pdf | format = PDF }} | |||
</ref> | |||
and that two small prospective studies of the Paleolithic diet in humans have shown some positive health outcomes.<ref name="doi10.1126/science.317.5835.175c"/><ref name="pmid19209185"> | |||
{{cite journal | |||
| author = Frassetto LA, Schloetter M, Mietus-Synder M, Morris RC Jr, Sebastian A. | |||
| date = February 11, 2009 | |||
| title = Metabolic and physiologic improvements from consuming a paleolithic, hunter-gatherer type diet | |||
| journal = European Journal of Clinical Nutrition | |||
| doi = 10.1038/ejcn.2009.4 | pmid = 19209185 }} | |||
</ref> | |||
Supporters point to several potentially ] nutritional characteristics of allegedly preagricultural diets.<ref name="pmid15699220"/><ref name="pmid16441938"> | |||
{{cite journal | |||
| author = Eaton, S. Boyd | |||
| title = The ancestral human diet: what was it and should it be a paradigm for contemporary nutrition? | |||
| journal = Proceedings of the Nutrition Society | |||
| volume = 65 | issue = 1 | pages = 1–6 | year = 2006 | month = February | |||
| pmid = 16441938 | doi = 10.1079/PNS2005471 | |||
| url = http://journals.cambridge.org/action/displayFulltext?type=6&fid=814480&jid=&volumeId=&issueId=01&aid=814476&fulltextType=MR&fileId=S0029665106000012}} | |||
</ref> | |||
In the 21st century, the sequencing of the ] and ] of the remains of early humans have found evidence that ] rapidly in response to changing diet. This evidence undermines a core premise of the paleolithic diet{{snd}}that human digestion has remained essentially unchanged over time.<ref>{{Harvnb|Whoriskey|2016}}; {{Harvnb|Zuk|2013|p=133}}: "No one can legitimately claim to have found the only 'natural' diet for humans. We simply ate too many different foods in the past, and have adapted to new ones".</ref> Palaeontological evidence has indicated that prehistoric humans ate plant-heavy diets that regularly included grains and other starchy vegetables, in contrast to the claims of the Paleo diet.<ref>{{Cite web |date=2024-02-20 |title=Science debunks a misleading myth about the paleo diet |url=https://www.inverse.com/culture/real-paleo-diet-had-carbs |access-date=2024-11-06 |website=Inverse |language=en}}</ref><ref>{{Cite web |last=Wong |first=Kate |date=2024-07-01 |title=To Follow the Real Early Human Diet, Eat Everything |url=https://www.scientificamerican.com/article/to-follow-the-real-early-human-diet-eat-everything/ |access-date=2024-11-06 |website=Scientific American |language=en}}</ref><ref>{{Cite journal |last1=Henry |first1=Amanda G. |last2=Brooks |first2=Alison S. |last3=Piperno |first3=Dolores R. |date=2011-01-11 |title=Microfossils in calculus demonstrate consumption of plants and cooked foods in Neanderthal diets (Shanidar III, Iraq; Spy I and II, Belgium) |journal=Proceedings of the National Academy of Sciences |language=en |volume=108 |issue=2 |pages=486–491 |doi=10.1073/pnas.1016868108 |doi-access=free |issn=0027-8424 |pmc=3021051 |pmid=21187393}}</ref><ref>{{Cite journal |last=Dein |first=Simon |date=2022-10-07 |title=The myth of the golden past: Critical perspectives on the paleo diet |url=https://journals.openedition.org/aof/13805 |journal=Anthropology of Food |language=en |doi=10.4000/aof.13805 |issn=1609-9168|doi-access=free }}</ref><ref>{{Citation |last1=Challa |first1=Hima J. |title=Paleolithic Diet |date=2024 |work=StatPearls |url=https://www.ncbi.nlm.nih.gov/books/NBK482457/ |access-date=2024-11-06 |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=29494064 |last2=Bandlamudi |first2=Manav |last3=Uppaluri |first3=Kalyan R.}}</ref> | |||
This dietary approach is a controversial topic amongst ]s<ref name="pmid10466159"> | |||
{{cite journal | |||
| author = ] | |||
| title = Animal v. plant foods in human diets and health: is the historical record unequivocal? | |||
| journal = Proceedings of the Nutrition Society | |||
| volume = 58 | issue = 2 | pages = 211–18 | year = 1999 |month = May | |||
| pmid = 10466159 | doi = 10.1017/S0029665199000300 | |||
| url = http://journals.cambridge.org/action/displayFulltext?type=6&fid=795460&jid=&volumeId=&issueId=02&aid=795456&fulltextType=MR&fileId=S0029665199000300}} | |||
</ref><ref name="doi10.1079/PHN2006959"> | |||
{{cite journal | |||
| author = Cannon, Geoffrey | |||
| title = Sabre-tooth tigers and stud poker | |||
| journal = Public Health Nutrition | |||
| volume = 9 | issue = 4 | pages = 411–14 | year = 2006 | month = June | |||
| doi = 10.1079/PHN2006959 | |||
| url = http://journals.cambridge.org/action/displayFulltext?type=6&fid=633236&jid=&volumeId=&issueId=04&aid=585276&fulltextType=XX&fileId=S1368980006000723}} | |||
</ref> | |||
and ]s,<ref name="pmid12494313"/><ref name="isbn0897897366"> | |||
{{cite book | |||
| last = Milton, Katharine | |||
| editor = Ungar, Peter S. & Teaford, Mark F. | |||
| title = Human Diet: Its Origins and Evolution | |||
| year = 2002 | publisher = Bergin and Garvey | location = ] | |||
| isbn = 0897897366 | pages = 111–22 | |||
| chapter = Hunter-gatherer diets: wild foods signal relief from diseases of affluence (PDF) | |||
| chapterurl = http://nature.berkeley.edu/miltonlab/pdfs/humandiet.pdf}} | |||
</ref> | |||
and it has been qualified as a ] by the ] and ].<ref> | |||
{{cite web | |||
| url = http://www.eatright.org/cps/rde/xchg/ada/hs.xsl/media_11092_ENU_HTML.htm | |||
| title = www.eatright.org | |||
| format = | work = | accessdate = }} | |||
</ref><ref name=NHS> | |||
{{cite web | |||
| url = http://www.nhs.uk/news/2008/05May/Pages/Cavemanfaddiet.aspx | |||
| title = Caveman fad diet | |||
| format = |work = |accessdate = }} | |||
</ref> | |||
Critics have argued that if hunter gatherer societies failed to suffer from "diseases of civilization", this was due to a lack of calories in their diet, or a variety of other factors, rather than because of some special diet composition.<ref name="pmid10702155"/> Some researchers have taken issue with the accuracy of the diet's underlying evolutionary logic,<ref name="Elton2008"> | |||
{{cite book | |||
| last = Elton, S. | |||
| editor = O’Higgins, P. & Elton, S. | |||
| title = Medicine and Evolution: Current Applications, Future Prospects | |||
| year = 2008 | publisher = ] | location = London | |||
| isbn = 1420051342 | |||
| chapter = Environments, adaptations and evolutionary medicine: Should we be eating a ‘stone age’ diet? }} | |||
</ref><ref name="pmid10702155"> | |||
{{cite journal | |||
| author = Milton, Katharine | |||
| title = Hunter-gatherer diets—A different perspective | |||
| journal = American Journal of Clinical Nutrition | |||
| volume = 71 | issue=3 | pages = 665–67 | year = 2000 | month = March 1 | |||
| pmid = 10702155 | |||
| url = http://www.ajcn.org/cgi/content/full/71/3/665 }} | |||
</ref><ref name="pmid16997359"> | |||
{{cite journal | |||
| author = Ströhle A, Wolters M, Hahn A | |||
| title = Carbohydrates and the diet-atherosclerosis connection—More between earth and heaven. Comment on the article "The atherogenic potential of dietary carbohydrate" | |||
| journal = Preventive Medicine | |||
| volume = 44 | issue = 1 | pages = 82–4 | year = 2007 | month = January | |||
| pmid = 16997359 | doi = 10.1016/j.ypmed.2006.08.014 }} | |||
</ref> | |||
and have disputed certain dietary recommendations and restrictions on the grounds that they provide no health benefits or pose health risks<ref name="Elton2008"/><ref name="pmid10702155"/> and are not likely to accurately reflect the features of ancient Paleolithic diets.<ref name="pmid16997359"/><ref name="doi10.1046/j.1467-3010.2000.00019.x"> | |||
{{cite journal | |||
| author = ] | |||
| title = Paleolithic diets: a sceptical view | |||
| journal = Nutrition Bulletin | |||
| volume = 25 | issue = 1 | pages = 43–7 | year = 2000 | month = March | |||
| doi = 10.1046/j.1467-3010.2000.00019.x }} | |||
</ref> | |||
It has also been argued that such diets are not a realistic alternative for everyone.<ref name=MoffatBookReview> | |||
{{cite journal | |||
| author = Moffat, Tina | |||
| title = Book Review—Evolutionary Aspects of Nutrition and Health: Diet, Exercise, Genetics and Chronic Disease | |||
| journal = Human Biology | |||
| year = 2001 | volume = 73 | issue = 2 | pages = 327–29 | |||
| doi = 10.1353/hub.2001.0021 | |||
| url = http://muse.jhu.edu/journals/human_biology/v073/73.2moffat.html }} | |||
</ref><ref name="pmid16167639"> | |||
{{cite journal | |||
| author = Jacks, Gunnar | |||
| title = Paleolitisk kost—ett realistiskt alternativ för alla? | |||
| journal = ] | language = Swedish | |||
| volume = 102 | issue = 34 | pages = 2334 | date = August 22–28, 2005 | |||
| pmid = 16167639 | |||
| url = http://www.lakartidningen.se/store/articlepdf/1/1852/LKT0534s2334_2334.pdf | format = PDF }} | |||
</ref> | |||
Advocates promote the paleolithic diet as a way of improving ].<ref>{{Harvnb|NHS|2008}}.</ref> There is some evidence that following it may lead to improvements in body composition and metabolism compared with the typical ]<ref>{{Harvnb|Katz|Meller|2014}}.</ref> or compared with diets recommended by some European nutritional guidelines.<ref>{{Harvnb|Manheimer|van Zuuren|Fedorowicz|Pijl|2015}}.</ref> On the other hand, following the diet can lead to ], such as an inadequate ] intake, and side effects can include weakness, ], and ]s.<ref> | |||
== History == | |||
''For calcium deficicency see'' {{Harvnb|Tarantino|Citro|Finelli|2015}}; ''for other risks see'' {{Harvnb|Obert|Pearlman|Obert|Chapin|2017}}. | |||
] Walter L. Voegtlin was one of the first to suggest that following a diet similar to that of the Paleolithic era would improve a person's health.<ref name="article4919415.ece"/> In 1975, he published a book<ref name="isbn0533013143"/> in which he argued that humans are carnivorous animals and that the ancestral Paleolithic diet was that of a carnivore—chiefly fats and protein, with only small amounts of carbohydrates.<ref name=westonaprice22> | |||
{{cite web | |||
| last = Fallon | first = Sally | coauthors = ] | |||
| title = Caveman Cuisine | publisher = ] | |||
| url = http://www.westonaprice.org/traditional_diets/caveman_cuisine.html | |||
| date = January 1, 2000 | accessdate = January 19, 2008}} | |||
</ref><ref> | |||
{{cite web | |||
| title = Functional and Structural Comparison of Man's Digestive Tract with that of a Dog and Sheep | |||
| url = http://www.paleodiet.com/comparison.html | |||
| accessdate = January 19, 2008 }} | |||
</ref> | |||
His dietary prescriptions were based on his own medical treatments of various digestive problems, namely ], ], ] and ].<ref name="isbn0533013143"/><ref name="isbn0312975910"> | |||
{{cite book | |||
| last = Audette | first = Ray V. | coauthors = Gilchrist, Troy; Audette, Raymond V.; & Eades, Michael R. | |||
| title = Neanderthin : Eat Like a Caveman to Achieve a Lean, Strong, Healthy Body | |||
| year = 2000 | |||
| publisher = ] | |||
| location = New York | |||
| isbn = 0312975910 }} | |||
</ref> | |||
In 1985, ] and S. Boyd Eaton, an associate clinical professor of radiology and an adjunct associate professor of ] at ], published a key paper on Paleolithic nutrition in the '']'',<ref name="pmid2981409"> | |||
{{cite journal | |||
| author = Eaton, S. Boyd; & ] | |||
| title = Paleolithic nutrition. A consideration of its nature and current implications | |||
| journal = ] | |||
| volume = 312 | issue = 5 | pages = 283–89 | year = 1985 | |||
| pmid = 2981409 }} | |||
</ref> | |||
which allowed the dietary concept to gain mainstream medical recognition.<ref> | |||
{{cite news | |||
| last = Taylor |first=Mike | |||
| title = Refined Food Bad! Caveman Diet Good! | |||
| publisher = ] | |||
| date = January 9, 2008 | |||
| url = http://www.thestreet.com/funds/goodlife/10397540.html | |||
| accessdate = January 19, 2008 }} | |||
</ref> | |||
Three years later, S. Boyd Eaton, ] and Melvin Konner published a book about this nutritional approach,<ref name="isbn0060158719"> | |||
{{cite book | |||
| last = Eaton | first = S. Boyd | coauthors = ]; & ] | |||
| title = The Paleolithic Prescription: A Program of Diet & Exercise and a Design for Living | |||
| year = 1988 | |||
| publisher = ] | |||
| location = New York | |||
| isbn = 0060158719 }} | |||
</ref> | |||
which was based on achieving the same proportions of nutrients (fat, protein, and carbohydrates, as well as vitamins and minerals) as were present in the diets of late Paleolithic people, not on excluding foods that were not available before the development of agriculture. As such, this nutritional approach included skimmed milk, whole-grain bread, brown rice, and potatoes prepared without fat, on the premise that such foods have the same nutritional properties as Paleolithic foods.<ref name=westonaprice22/><ref name="doi10.1007/BF00999126"> | |||
{{cite journal | |||
| author = Sirota, Lorraine Handler; & Greenberg, George | |||
| title = Book reviews | |||
| journal = Applied Psychophysiology and Biofeedback | |||
| volume = 14 | issue = 4 | pages = 347–54 | year = 1989 | month = December | |||
| doi = 10.1007/BF00999126 }} | |||
</ref><ref> | |||
{{cite book | |||
| title = Diets and Dieting: A Cultural Encyclopedia | |||
| editors = Gilman, Sander L |author=Gilman, Sander L.; Bauber, Joe | |||
| year = 2007 | |||
| chapter = Paleolithic diet | |||
| pages = 209–211 | |||
| publisher = Routledge | |||
| isbn = 0415974208 | |||
| url = http://books.google.ca/books?id=wO22lbDi7yAC&printsec=frontcover&hl=fr#PPA209,M1 }} | |||
</ref> | |||
In 1989, these authors published a second book on Paleolithic nutrition.<ref name="isbn0207162646"> | |||
{{cite book | |||
| last = Eaton | first = S. Boyd | coauthors = ]; & ] | |||
| title = Stone-Age Health Programme | |||
| year = 1989 | |||
| publisher = ] | |||
| isbn = 0207162646 }} | |||
</ref><ref name=GailVines> | |||
{{cite news | |||
| last = Vines | first = Gail | |||
| title = Palaeolithic recipe for the clean life / Review of 'The Stone-Age Health Programme' by S. Boyd Eaton, Marjorie Shostak and Melvin Konner | |||
| publisher = ] | |||
| date = August 26, 1989 | |||
| url = http://www.newscientist.com/article/mg12316794.400-palaeolithic-recipe-for-the-clean-life--review-of-thestoneage-health-programme-by-s-boyd-eaton-marjorie-shostak-and-melvinkonner-.html | |||
| accessdate = January 19, 2008 }} | |||
</ref> | |||
Since the end of the 1990s, a number of medical doctors and nutritionists<ref name="isbn0446608246"> | |||
{{cite book | |||
| author = Eades, Michael R. & Eades, Mary Dan | |||
| title = The Protein Power Lifeplan | |||
| year = 2000 | publisher = ] | location = New York | |||
| isbn = 0446608246 }} | |||
</ref><ref name="isbn0091889480"> | |||
{{cite book | |||
| last = Atkins | first = Robert C. | |||
| title = Dr Atkins' New Diet Revolution | |||
| year = 1999 | publisher = Vermilion | isbn = 0091889480 }} | |||
</ref><ref name="isbn3927372234"> | |||
{{cite book | |||
| last = Worm | first = Nicolai | |||
| title = Syndrom X oder ein Mammut auf den Teller. Mit Steinzeit-Diät aus det Wohl stands Falle | |||
| year = 2002 | publisher = Systemed-Verlag | |||
| location = Lünen | language = German | isbn = 3927372234 }} | |||
</ref> | |||
have advocated a return to a so-called Paleolithic (preagricultural) diet.<ref name="pmid12494313"/> Proponents of this nutritional approach have published books<ref name="isbn0312975910"/><ref name="isbn0471267554"> | |||
{{cite book | |||
| last = Cordain |first=Loren | |||
| title = The Paleo Diet: Lose Weight and Get Healthy by Eating the Food You Were Designed to Eat | |||
| year = 2002 | publisher = ] | |||
| location = New York | isbn = 0471267554 }} | |||
</ref><ref name="isbn1594860890"> | |||
{{cite book | |||
| author = Cordain, Loren & Friel, Joe | |||
| title = The Paleo Diet for Athletes: A Nutritional Formula for Peak Athletic Performance | |||
| year = 2005 | publisher = ] | isbn = 1594860890 }} | |||
</ref><ref name="isbn9144041675"> | |||
{{cite book | |||
| author = Lindeberg, Staffan | |||
| title = Maten och folksjukdomarna — ett evolutionsmedicinskt perspektiv | |||
| language = Swedish | year = 2003 | |||
| publisher = Studentlitteratur | location = Lund | isbn = 9144041675 }} | |||
</ref> | |||
and created websites<ref name=Lindeberg44> | |||
{{cite web | |||
| last = Lindeberg | first = Staffan | |||
| title = Home | work = Paleolithic Diet in Medical Nutrition | |||
| url = http://www.staffanlindeberg.com/Home.html | accessdate = January 19, 2008 }} | |||
</ref><ref name=CordainWebSite1> | |||
{{cite web | last = Cordain | first = Loren | |||
| title = The Science of Healthy Eating |work=The Paleo Diet | |||
| url = http://www.thepaleodiet.com/ | accessdate = January 19, 2008 }} | |||
</ref> | |||
to promote their dietary prescriptions.<ref> | |||
{{cite news | |||
| last = Vogin | first = Gary | |||
| title = Eating Like a Caveman | |||
| publisher = ] | year = 2000 | |||
| url = http://www.webmd.com/diet/features/eating-like-caveman | |||
| accessdate = August 3, 2008 }} | |||
</ref><ref> | |||
{{cite news | |||
| last = Burfoot | first = Amby | |||
| title = Should you be eating like a Caveman? | |||
| publisher = ] | date = February 11, 2005 | |||
| url = http://www.runnersworld.com/article/0,7120,s6-242-303-307-9048-0,00.html | |||
| accessdate = January 19, 2008 }} | |||
</ref><ref> | |||
{{cite news | |||
| last = Shreeve |first=Jimmy Lee | |||
| title = The Stone Age Diet: Why I Eat Like a Caveman | |||
| publisher = ] | |||
| date = August 16, 2007 | |||
| url = http://www.alternet.org/healthwellness/59864/ | |||
| accessdate = January 19, 2008 }} | |||
</ref><ref> | |||
{{cite news | |||
| last = Tuttle | first = Erica | |||
| title = Revolutionary Evolutionary Diets | |||
| publisher = ] | |||
| date = September 4, 2000 | |||
| url = http://findarticles.com/p/articles/mi_m1571/is_33_16/ai_65091766 | |||
| accessdate = January 19, 2008 }} | |||
</ref><ref> | |||
{{cite journal | |||
| author = Mysterud, Iver | |||
| title = Kosthold og evolusjon | |||
| journal = Tidsskr nor Lægeforen | |||
| volume = 124 | issue = 10 | date = May 20, 2004 | pages = 1415 | language = Swedish | |||
| url = http://www.tidsskriftet.no/index.php?vp_SEKS_ID=1021682 }} | |||
</ref> | |||
They have synthesized diets from commonly available modern foods that would emulate the nutritional characteristics of the ancient Paleolithic diet, some allowing specific foods that would have been unavailable to preagricultural peoples, such as certain processed oils and beverages.<ref name="isbn0312975910"/><ref name=CordainWebSiteRecipes> | |||
{{cite web | |||
|last=Cordain |first=Loren | |||
|title=A Sample of Paleo Recipes |work=The Paleo Diet | |||
|url=http://www.thepaleodiet.com/nutritional_tools/recipes.shtml | |||
|accessdate=January 19, 2008 }} | |||
</ref><ref name=LindebergWebSiteFood> | |||
{{citeweb | |||
|last=Lindeberg |first=Staffan | |||
|title=Frequently Asked Questions: What can I eat? | |||
|work=Paleolithic Diet in Medical Nutrition | |||
|url=http://www.staffanlindeberg.com/Food.html | |||
|accessdate=January 19, 2008 }} | |||
</ref> | |||
== Practices == | |||
] | |||
] | |||
The Paleolithic diet is a modern dietary regimen that seeks to mimic the diet of preagricultural hunter-gatherers, one that corresponds to what was available in any of the ]s of Paleolithic humans.<ref name=doi:10.1080/11026480510032043/><ref name=JNutriEnvironMed2003;13(3):149-160/> Based upon commonly available modern foods, it includes ] plants and domesticated animal meat as an alternative to the wild sources of the original preagricultural diet.<ref name=doi:10.1080/11026480510032043/><ref name=JAmNeutraceutAssoc2002;5:15-24/><ref name="pmid14708953">{{cite journal |author=O'Keefe, James H.; & Cordain, Loren |title=Cardiovascular disease resulting from a diet and lifestyle at odds with our Paleolithic genome: how to become a 21st-century hunter-gatherer |journal=] |volume=79 |issue=1 |pages=101–08 |year=2004 |month=January |pmid=14708953 |format=PDF |url=http://www.thepaleodiet.com/articles/Hunter-Gatherer%20Mayo.pdf |doi=10.4065/79.1.101}}</ref> The ancestral human diet is inferred from historical and ] studies of modern-day ]s as well as archaeological finds and ] evidence.<ref name="pmid15699220"/><ref name="isbn9781402096983">{{cite book |last=Lindeberg |first=Staffan |editors=Hublin, Jean-Jacques; & Richards, Michael P |title=The Evolution of Hominin Diets: Integrating Approaches to the Study of Palaeolithic Subsistence |year=2009 |publisher=] |chapter=Modern human physiology with respect to evolutionary adaptations that relate to diet in the past |chapterurl=http://www.eva.mpg.de/evolution/conf2006/files/abstracts.htm |isbn=9781402096983}}</ref><ref name="isbn0195183460chap19">{{cite book |last=Cordain |first=Loren |editor=Ungar, Peter S. |title=Evolution of the Human Diet: The Known, the Unknown, and the Unknowable |year=2006 |publisher=] |location=Oxford, USA |isbn=0195183460 |pages=363–83 |chapter=Implications of Plio-Pleistocene Hominin Diets for Modern Humans (PDF) |chapterurl=http://www.thepaleodiet.com/articles/2006_Oxford.pdf}}</ref> | |||
The Paleolithic diet consists of foods that can be hunted and fished, such as meat, ] and seafood, and that can be gathered, such as eggs, insects, fruit, nuts, seeds, vegetables, mushrooms, herbs and spices.<ref name=doi:10.1080/11026480510032043/><ref name=JAmNeutraceutAssoc2002;5:15-24/> Practitioners are advised to eat only the leanest cuts of meat, free of ]s, preferably wild ] meats and ] since they contain high levels of ] fats compared with grain-produced domestic meats.<ref name=doi:10.1080/11026480510032043/><ref name=JAmNeutraceutAssoc2002;5:15-24/><ref name="pmid14708953"/><ref name="pmid11960292">{{cite journal |author=Cordain L, Watkins BA, Florant GL, Kelher M, Rogers L, Li Y |title=Fatty acid analysis of wild ruminant tissues: evolutionary implications for reducing diet-related chronic disease |journal=European Journal of Clinical Nutrition |volume=56 |issue=3 |pages=181–91 |year=2002 |month=March |pmid=11960292 |doi=10.1038/sj.ejcn.1601307 |url=http://www.nature.com/ejcn/journal/v56/n3/full/1601307a.html}}</ref> Food groups that advocates claim were rarely or never consumed by humans before the ] are excluded from the diet, mainly grains, legumes (e.g. peanuts), dairy products, salt, ] and processed oils,<ref name=doi:10.1080/11026480510032043/><ref name=JAmNeutraceutAssoc2002;5:15-24/> although some advocates consider the use of ]s with low ]/omega-3 ratios, such as ] and ], to be healthy and advisable.<ref name="pmid14708953"/> Practitioners are permitted to drink mainly water, and some advocates recommend tea as a healthy drink,<ref name="pmid14708953"/> but alcoholic and fermented beverages are restricted from the diet.<ref name=JAmNeutraceutAssoc2002;5:15-24/><ref name="pmid14708953"/> Furthermore, eating a wide variety of plant foods is recommended to avoid high intakes of potentially harmful ] substances, such as ]s, which are present in certain roots, vegetables and seeds.<ref name=doi:10.1080/11026480510032043/><ref name="isbn9781402096983"/><ref name=ReplytoCunnane>{{cite journal |author=Cordain L, Eaton SB, Sebastian A, Mann N, Lindeberg S, Watkins BA, O'Keefe JH, ] |title=Reply to SC Cunnane |journal=American Journal of Clinical Nutrition |volume=82 |issue=2 |pages=483–84 |year=2005 |pmid=16087997 |url=http://www.ajcn.org/cgi/reprint/82/2/483 |format=PDF |month=Aug |day=01}}</ref> Unlike ]s, all foods may be cooked, without restrictions.<ref name=doi:10.1080/11026480510032043/><ref name="isbn0195183460chap20">{{cite book |last=Eaton |first=S. Boyd |editor=Ungar, Peter S. |title=Evolution of the Human Diet: The Known, the Unknown, and the Unknowable |year=2006 |publisher=] |location=Oxford, USA |isbn=0195183460 |pages=400 |chapter=Preagricultural Diets and Evolutionary Health Promotion |chapterurl=http://books.google.ca/books?id=6mxZ1hNBHgkC&printsec=frontcover&dq=#PPA400,M1}}</ref> Cooking is widely accepted to have been practiced 250,000 years ago in the ], and possibly as long ago as 500,000 years ago.<ref>{{cite journal |last=Gibbons |first=Ann |title=Food for Thought: Did the first cooked meals help fuel the dramatic evolutionary expansion of the human brain? |journal=] |volume=316 |issue=5831 |pages=1558–1560 |date=June 15, 2007 |url=http://files.meetup.com/254306/Food%20for%20Thought.pdf |doi=10.1126/science.316.5831.1558 |pmid=17569838}}</ref> | |||
According to certain proponents of the Paleolithic diet, practitioners should derive about 56–65% of their ] from ] and 36–45% from plant foods. They recommend a diet ] (19–35% energy) and ] (22–40% energy), with a fat intake (28–58% energy) similar to or higher than that found in ]s.<ref name="pmid14708953"/><ref name="pmid10702160">{{cite journal |author=Cordain L, Miller JB, Eaton SB, Mann N, Holt SH, Speth JD |title=Plant-animal subsistence ratios and macronutrient energy estimations in worldwide hunter-gatherer diets |journal=American Journal of Clinical Nutrition |volume=71 |issue=3 |pages=682–92 |year=2000 |pmid=10702160 |url=http://www.ajcn.org/cgi/content/full/71/3/682 |month=Mar |day=01}}</ref><ref name="pmid11965522">{{cite journal |author=Cordain L, Eaton SB, Miller JB, Mann N, Hill K |title=The paradoxical nature of hunter-gatherer diets: meat based, yet non-atherogenic |journal=European Journal of Clinical Nutrition |volume=56 |issue=Suppl 1 |pages=S42–52 |year=2002 |month=March |pmid=11965522 |doi=10.1038/sj.ejcn.1601353 |url=http://www.nature.com/ejcn/journal/v56/n1s/pdf/1601353a.pdf |format=PDF}}</ref> Furthermore, some proponents exclude from the diet foods which exhibit high ], such as potatoes.<ref name=JAmNeutraceutAssoc2002;5:15-24/> Staffan Lindeberg, an associate professor in the Department of Medicine at the ], advocates a Paleolithic diet, but does not recommend any particular proportions of plants versus meat or ] ratios.<ref name=doi:10.1080/11026480510032043/><ref name="isbn9781402096983"/> According to Lindeberg, ] ] may be considered when the intake of ] and other dietary sources of calcium is limited.<ref name=doi:10.1080/11026480510032043/> | |||
== Rationale and evolutionary assumptions == | |||
] showing the relative proportions of food recommended by the ]. Grains and cereals, which are excluded from the Paleolithic diet, form the base of the pyramid.]] | |||
According to S. Boyd Eaton, "we are the heirs of inherited characteristics accrued over millions of years; the vast majority of our biochemistry and physiology are tuned to life conditions that existed prior to the advent of agriculture some 10,000 years ago. Genetically our bodies are virtually the same as they were at the end of the Paleolithic era some 20,000 years ago."<ref name="pmid9104571">{{cite journal |author=Eaton SB, Eaton SB 3rd, ] |title=Paleolithic nutrition revisited: a twelve-year retrospective on its nature and implications |journal=European Journal of Clinical Nutrition |volume=51 |issue=4 |pages=207–16 |year=1997 |pmid=9104571 |format=PDF |doi=10.1038/sj.ejcn.1600389 |url=http://www.nature.com/ejcn/journal/v51/n4/pdf/1600389a.pdf}}</ref> | |||
Paleolithic nutrition has its roots in ] and is a common theme in ].<ref name="pmid18791103"/><ref name="pmid11817903"/><ref>{{cite journal |author=Eaton SB, Cordain L, Eaton SB |year=2001 |month= |title=An evolutionary foundation for health promotion |journal=World Review of Nutrition and Dietetics |volume=90 |pages=5–12 |pmid=11545045 |url=http://www.thepaleodiet.com/articles/Health%20promotion%20article.pdf |format=PDF |doi=10.1159/000059815}}</ref> The reasoning underlying this nutritional approach is that ] had sufficient time to genetically adapt the ] and ] of Paleolithic humans to the varying dietary conditions of that era. But in the 10,000 years since the invention of agriculture and its consequent major change in the human diet, natural selection has had too little time to make the optimal genetic adaptations to the new diet.<ref name=doi:10.1080/11026480510032043/> Physiological and metabolic ]s result from the suboptimal genetic adaptations to the contemporary human diet, which in turn contribute to many of the so-called ].<ref name=JNutriEnvironMed2003;13(3):149-160/> | |||
More than 70% of the total daily energy consumed by all people in the United States comes from foods, such as dairy products, cereals, refined sugars, refined vegetable oils and alcohol, that advocates of the Paleolithic diet assert contributed little or none of the energy in the typical preagricultural ] diet.<ref name="pmid15699220"/> Proponents of this diet argue that excessive consumption of these novel Neolithic and Industrial era foods is responsible for the current epidemic levels of ], ], ], ], ] and ] in the US and other contemporary Western populations.<ref name="pmid15699220"/> This is despite evidence that Paleolithic societies were processing cereals for food use at least as early as 23,000 years ago<ref> | |||
{{cite journal | |||
| last = Piperno | |||
| first = D | |||
| coauthors = Weiss, E., Hols, I., Nadel, D | |||
| title = Processing of wild cereal grains in the Upper Paleolithic revealed by starch grain analysis | |||
| journal = Nature | |||
| volume = 430 | |||
| date = 2004 | |||
| pages = 670-673 | |||
| url = http://anthropology.si.edu/archaeobio/Ohalo%20II%20Nature.pdf | |||
}} | |||
</ref><ref> | |||
{{cite journal | |||
| last = Aranguren | |||
| first = B | |||
| coauthors = Becattani, R., Lippi, M.M., Revedin, A | |||
| date = 2007 | |||
| journal = Antiquity | |||
| title = Grinding flour in Upper Palaeolithic Europe (25 000 years bp) | |||
| volume = 81 | |||
| pages = 845-855 | |||
| url = http://antiquity.ac.uk/Ant/081/0845/ant0810845.pdf | |||
}} | |||
</ref> and perhaps as early as 200,000 years ago.<ref> | |||
{{cite book | |||
| last = Murphy | |||
| first = D | |||
| title = People, Plants and Genes: The Story of Crops and Humanity | |||
| date = 2007 | |||
| publisher = Oxford University Press | |||
| location = Oxford | |||
}} | |||
</ref> | </ref> | ||
==History and terminology== | |||
=== Opposing views on human evolution === | |||
Adrienne Rose Johnson writes that the idea that the primitive diet was superior to current dietary habits dates back to the 1890s with such writers as ] and ]. Densmore proclaimed that "] is the staff of death", while Kellogg supported a diet of starchy and grain-based foods in accord with "the ways and likings of our primitive ancestors".<ref>{{Harvnb|Johnson|2015}}.</ref> ] advocated an early version of the Paleolithic diet in his 1952 book, ''Primitive Man and His Food''.<ref>{{Harvnb|Newton|2019|page=102}}.</ref> In 1958, ] authored ''Eat Fat and Grow Slim'', which proposed a low-carbohydrate "Stone Age" diet.<ref>{{Harvnb|Hill|1996}}; {{Harvnb|Smith|2015|p=117}}: "Mackarness, who founded the first British National Health Service clinical ecology clinic in Basingstoke, pioneered the so-called Stone Age Diet, in the belief that humans had not evolved to consume foods, including wheat and milk, developed since Paleolithic times (in fact, today's weight-reduction version of Mackarness's Stone Age diet is called the 'Paleo diet')."</ref> | |||
In his 1975 book ''The Stone Age Diet'', gastroenterologist ] advocated a meat-based diet, with low proportions of vegetables and starchy foods, based on his declaration that humans were "exclusively flesh-eaters" until 10,000 years ago.<ref>{{Harvnb|Zuk|2013|pp=111–112}}.</ref> | |||
The evolutionary assumptions underlying the Paleolithic diet have been disputed.<ref name="isbn0897897366"/><ref name="Elton2008"/><ref name="pmid16997359"/><ref name="doi10.1007/BF00999126"/> According to Alexander Ströhle, Maike Wolters and Andreas Hahn, with the Department of Food Science at the ], the statement that the ] evolved during the ] (a period from 1,808,000 to 11,550 years ago) rests on an | |||
inadequate, but popular ].<ref name="pmid16997359"/> They rely on Russell (2001)<ref name="isbn0521620708">{{cite book |last=Gray |first=Russell D. |editor=Singh, Rama S.; Krimbas, Costas B.; Paul, Diane B.; & Beatty, John |title=Thinking about Evolution: Historical, Philosophical and Political Perspectives |year=2001 |publisher=] |location=Cambridge |isbn=0521620708 |pages=184–207 |chapter=Selfish genes or developmental systems?}}</ref> to argue that evolution of organisms cannot be reduced to the genetic level with reference to ] and that there is no one-to-one relationship between ] and ].<ref name="pmid16997359"/> | |||
In 1985 ] and ] published a controversial article in the '']'' proposing that modern humans were biologically very similar to their primitive ancestors and so "genetically programmed" to consume pre-agricultural foods. Eaton and Konner proposed a "discordance hypothesis" by which the mismatch between modern diet and human biology gave rise to lifestyle diseases, such as ] and ].<ref>{{Harvnb|Johnson|2015}}.</ref> | |||
They further question the notion that 10,000 years since the dawn of agriculture is a period not nearly sufficient to ensure an adequate ] to ] diets.<ref name="pmid16997359"/> Referring to Wilson (1994),<ref name=WilsonDS>{{cite journal |author=] |title=Adaptive genetic variation and human evolutionary psychology |journal=Ethology and Sociobiology |volume=15 |issue= |pages=219–35 |year=1994 |doi=10.1016/0162-3095(94)90015-9}}</ref> Ströhle et al. argue that "the number of ]s that a species existed in the old ] was irrelevant, and that the response to the change of the environment of a ] would depend on the ] of the ]s, the intensity of ] and the number of generations that selection acts."<ref name="doi:10.1016/j.ypmed.2006.09.003">{{cite journal |author=Kopp, Wolfgang |title=Reply to the comment of Ströhle et al. |journal=Preventive Medicine |volume=44 |issue=1 |pages=84–5 |year=2007 |month=January |pmid=16997359 |doi=10.1016/j.ypmed.2006.09.003}}</ref> They state that if the diet of ] ]s had been in discordance with their ], then this would have created a ] for evolutionary change and modern humans, such as ]s, whose ancestors have subsisted on agrarian diets for 400–500 generations should be somehow adequately adapted to it. In response to this argument, Wolfgang Kopp states that "we have to take into account that death from atherosclerosis and cardiovascular disease (CVD) occurs later during life, as a rule after the reproduction phase. Even a high mortality from CVD after the reproduction phase will create little ]. Thus, it seems that a diet can be functional (it keeps us going) and dysfunctional (it causes health problems) at the same time."<ref name="doi:10.1016/j.ypmed.2006.09.003"/> Moreover, S. Boyd Eaton and colleagues have indicated that "comparative genetic data provide compelling evidence against the contention that long exposure to agricultural and industrial circumstances has distanced us, genetically, from our Stone Age ancestors."<ref name="pmid11817904"/> | |||
The diet started to become popular in the 21st century, where it attracted a largely internet-based following using web sites, forums and social media.<ref>{{Harvnb|Chang|Nowell|2016}}.</ref> | |||
Referencing Mahner et al. (2001)<ref name=>{{cite journal |author=Mahner, Martin; & ] |title=Function and functionalism: a synthetic perspective |journal=Philosophy of Science |volume=68 |issue= |pages=75–94 |year=2001 |url=http://grupobunge.wordpress.com/2006/08/07/function-and-functionalism-a-synthetic-perspective-parte-1/ |doi=10.1086/392867}}</ref> and Ströhle et al. (2006),<ref name=Strohle768>{{cite journal |author=Ströhle, Alexander; & Hahn, Andreas |title=Evolutionary nutrition science and dietary recommendations of the Stone Age—The ideal answer to present-day nutritional questions or reason for criticism? Part 1: Concept, arguments and paleoanthropological findings |journal=Ernährungs-Umschau |format=PDF| volume=53 |issue=1 |pages=10–16 |year=2006 |language=German |url=http://www.dr-moosburger.at/pub/pub058.pdf}} </ref> Ströhle et al. state that "whatever is the fact, to think that a dietary factor is valuable (functional) to the organism only when there was ‘genetical adaptation’ and hence a new dietary factor is dysfunctional per se because there was no evolutionary adaptation to it, such a ] misreading of biological evolution seems to be inspired by a naive ] view of life."<ref name="pmid16997359"/> | |||
This diet's ideas were further popularized by ], a health scientist with a Ph.D. in physical education, who trademarked the words "The Paleo Diet" and who wrote a 2002 book of that title.<ref>{{Harvnb|Ask EN|2010}}. For Cordain's qualifications see {{Harvnb|Chang|Nowell|2016}}. For trademarking see {{Harvnb|Lowe|2014}}.</ref> | |||
Katharine Milton, a professor of ] at the ], has also disputed the evolutionary logic upon which the Paleolithic diet is based. She questions the premise that the metabolism of ] must be genetically adapted to the dietary conditions of the Paleolithic.<ref name="isbn0897897366"/> Relying on several of her previous publications,<ref name="pmid2843616">{{cite journal |author=Milton, Katharine; & Demment, Montague W. |title=Digestion and passage kinetics of chimpanzees fed high and low fiber diets and comparison with human data. |journal=Journal of Nutrition |volume=118 |issue=9 |pages=1082–88 |year=1988 |month=September |pmid=2843616 |url=http://jn.nutrition.org/cgi/reprint/118/9/1082 |format=PDF |day=01}}</ref><ref name="pmid10378206">{{cite journal |author=Milton, Katharine |title=Nutritional characteristics of wild primate foods: do the diets of our closest living relatives have lessons for us? |journal=Nutrition |volume=15 |issue=6 |format=PDF| pages=488–98 |year=1999 |month=June |pmid=10378206 |doi=10.1016/S0899-9007(99)00078-7 |url=http://nature.berkeley.edu/miltonlab/pdfs/nutritionalchar.pdf}}</ref><ref name=meateating>{{cite journal |author=Milton, Katharine |title=A hypothesis to explain the role of meat-eating in human evolution |journal=Evolutionary Anthropology |volume=8 |issue=1 |format=PDF |pages=11–21 |year=1999 |doi=10.1002/(SICI)1520-6505(1999)8:1<11::AID-EVAN6>3.0.CO;2-M |url=http://nature.berkeley.edu/miltonlab/pdfs/meateating.pdf}}</ref><ref name="pmid10906529">{{cite journal |author=Milton, Katharine |title=Back to basics: why foods of wild primates have relevance for modern human health |journal=Nutrition |format=PDF| volume=16 |pages=481–83 |year=2000 |pmid=10906529 |doi=10.1016/S0899-9007(00)00293-8 |url=http://nature.berkeley.edu/miltonlab/pdfs/backbasics.pdf}}</ref> Milton states that "there is little evidence to suggest that human nutritional requirements or human digestive physiology were significantly affected by such diets at ''any'' point in human evolution."<ref name="isbn0897897366"/> | |||
In 2012 the paleolithic diet was described as being one of the "latest trends" in diets, based on the popularity of diet books about it;<ref>{{Harvnb|Cunningham|2012}}.</ref> in 2013 and 2014 the Paleolithic diet was ]'s most searched weight-loss method.<ref>{{Harvnb|Chang|Nowell|2016}}.</ref> | |||
== Nutritional factors and health effects == | |||
The ''paleolithic'' or ''paleo'' diet is also sometimes referred to as the ''caveman'' or ''Stone Age'' diet.<ref>{{Harvnb|Shariatmadari|2014}}.</ref> | |||
] | |||
]-rich ]s, such as ]s, ]s, carrots, ] and ]s, maintain nutrient properties (low ] and ] responses) characteristic of | |||
traditional hunter-gatherer plant foods.<ref name=JAmNeutraceutAssoc2002;5:15-24/>]] | |||
==Foodstuffs== | |||
Since the end of the Paleolithic period, several foods that humans rarely or never consumed during previous stages of their evolution have been introduced as staples in their diet.<ref name="pmid15699220"/> With the advent of agriculture and the beginning of animal domestication roughly 10,000 years ago, during the ], humans started consuming large amounts of dairy products, beans, cereals, alcohol, salt and fatty domestic meats.<ref name="pmid15699220"/> In the late 18th and early 19th centuries, the ] led to the large scale development of mechanized ] techniques and ] methods, that enabled the production of ]s, ]s and refined ]s, as well as fattier domestic meats, which have become major components of ]s.<ref name="pmid15699220"/> | |||
]. Some recent paleo diet variants emphasize the consumption of unprocessed animal products.]] | |||
The basis of the diet is a re-imagining of what Paleolithic people ate, and different proponents recommend different diet compositions. Eaton and Konner, for example, wrote a 1988 book ''The Paleolithic Prescription'' with ], and it described a diet that is 65% plant-based. This is not typical of more recently devised paleo diets; Loren Cordain's – probably the most popular – instead emphasizes animal products and avoidance of ].<ref>{{Harvnb|Chang|Nowell|2016}}.</ref> Diet advocates concede the modern paleolithic diet cannot be a faithful recreation of what paleolithic people ate, and instead aim to "translate" that into a modern context, avoiding such likely historical practices as ].<ref>{{Harvnb|Kolbert|2014}}.</ref> | |||
Foodstuffs that have been described as permissible include: | |||
Such food staples have fundamentally altered several key nutritional characteristics of the human diet since the Paleolithic era, including ], ] composition, ] composition, ], ], ]-] ratio, and ] content.<ref name="pmid15699220"/> | |||
* "vegetables, fruits, nuts, ], meat, and organ meats";<ref>{{Harvnb|Tarantino|Citro|Finelli|2015}}.</ref> | |||
* "vegetables (including root vegetables), fruit (including fruit oils, e.g., olive oil, coconut oil, and ]), nuts, fish, meat, and eggs, and it excluded dairy, grain-based foods, legumes, extra sugar, and nutritional products of industry (including refined fats and refined carbohydrates)";<ref>{{Harvnb|Manheimer|van Zuuren|Fedorowicz|Pijl|2015}}.</ref> and | |||
* "avoids processed foods, and emphasizes eating vegetables, fruits, nuts and seeds, eggs, and lean meats".<ref>{{Harvnb|Katz|Meller|2014}}.</ref> | |||
The diet forbids the consumption of all ] products. This is because milking did not exist until animals were domesticated after the Paleolithic era.<ref>{{Harvnb|Longe|2008|p=180}}: "No dairy products are allowed while on this diet. This means no milk, cheese, butter, or anything else that comes from milking animals. This is because milking did not occur until animals were domesticated, sometime after the Paleolithic age. Eggs are allowed however, because Paleolithic man would probably have found eggs in bird's nests during foraging and hunting."</ref> | |||
These dietary compositional changes have been theorized as ]s in the ] of many of the so-called "diseases of civilization" and other chronic illnesses that are widely prevalent in Western societies,<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="pmid15699220"/><ref>{{cite journal |author=Fairweather-Tait, Susan J. |date=October 29, 2003 |title=Human nutrition and food research: opportunities and challenges in the post-genomic era |journal=Phil. Trans. R. Soc. Lond. B |volume=358 |issue=1438 |pages=1709–27 |doi=10.1098/rstb.2003.1377 |pmid=14561328 |url=http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=1693270&blobtype=pdf |format=PDF}}</ref><ref name="pmid16336696">{{cite journal |author=Jönsson T, Olsson S, Ahrén B, Bøg-Hansen TC, Dole A, Lindeberg S |title=Agrarian diet and diseases of affluence — Do evolutionary novel dietary lectins cause leptin resistance? |journal=BMC Endocrine Disorders |volume=5 |issue=10 |year=2005 |pmid=16336696 |doi=10.1186/1472-6823-5-10 |pages=10 |url=http://www.biomedcentral.com/1472-6823/5/10}}</ref><ref name=LeachMay25>{{cite journal |author=Leach, Jeff D. |title=Prebiotics in Ancient Diet |journal=Food Science and Technology Bulletin |volume=4 |issue=1 |pages=1–8 |year=2007 |doi=10.1616/1476-2137.14801 |url=http://www.paleobioticslab.com/prebiotics_in_ancient_diet.htm}}</ref><ref>{{cite journal |author=Collins, Christopher |date=January-March 2007 |title=Said Another Way: Stroke, Evolution, and the Rainforests: An Ancient Approach to Modern Health Care |journal=Nursing Forum |volume=42 |issue=1 |pages=39–44 |pmid=17257394 |doi=10.1111/j.1744-6198.2007.00064.x}}</ref> including ],<ref>{{cite journal |author=Bellisari A. |month=March | year=2008 |title=Evolutionary origins of obesity |journal=Obesity Reviews |volume=9 |issue=2 |pages=165–180 |doi=10.1111/j.1467-789X.2007.00392.x |pmid=18257754}}</ref><ref>{{cite journal |author=Strandvik, B. Eriksson, S. Garemo, M. Palsdottir, V. Samples, S. Pickova, J |date=March 4, 2008 |title=Is the relatively low intake of omega-3 fatty acids in Western diet contributing to the obesity epidemics? |journal=Lipid Technology |volume=20 |issue=3 |pages=57–59 |doi=10.1002/lite.200800009}}</ref><ref>{{cite journal |author=Wood LE |month=October | year=2006 |title=Obesity, waist–hip ratio and hunter–gatherers |journal=BJOG: an International Journal of Obstetrics & Gynaecology |volume=113 |issue=10 |pages=1110–16 |doi=10.1111/j.1471-0528.2006.01070.x |pmid=16972857}}</ref> ],<ref name="pmid15172426">{{cite journal |author=O'Keefe JH Jr, Cordain L, Harris WH, Moe RM, Vogel R |year=2004 |month=June |title=Optimal low-density lipoprotein is 50 to 70 mg/dl: lower is better and physiologically normal |journal=Journal of the American College of Cardiology |publisher=] |volume=43 |issue=11 |pages=2142–46 |pmid=15172426 |doi=10.1016/j.jacc.2004.03.046 |url=http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T18-4CGKPCX-16&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=5ea7879894f247fbf2b7d2a67c082c91}}</ref><ref name="pmid16784936">{{cite journal |author=O'Keefe JH Jr, Cordain L, Jones PG, Abuissa H. |year=2006 |month=July |title=Coronary artery disease prognosis and C-reactive protein levels improve in proportion to percent lowering of low-density lipoprotein |journal=] |volume=98 |issue=1 |pages=135–39 |doi=10.1016/j.amjcard.2006.01.062 |pmid=16784936 |url=http://www.ajconline.org/article/S0002-9149(06)00576-5/abstract}}</ref><ref name="pmid16540158">{{cite journal |author=Kopp, Wolfgang |title=The atherogenic potential of dietary carbohydrate |journal=Preventive Medicine |volume=42 |issue=5 |pages=336–42 |year=2006 |month=May |pmid=16540158 |doi=10.1016/j.ypmed.2006.02.003 |url=}}</ref> ],<ref>{{cite journal |author=Tekol, Yalcin |month=April | year=2008 |title=Maternal and infantile dietary salt exposure may cause hypertension later in life |journal=Birth Defects Research Part B: Developmental and Reproductive Toxicology |volume=83 |issue=2 |pages=77–79 |doi=10.1002/bdrb.20149 |pmid=18330898}}</ref> ],<ref>{{cite journal |author=Dedoussis GV, Kaliora AC, Panagiotakos DB |date=Spring 2007 |title=Genes, Diet and Type 2 Diabetes Mellitus: A Review |journal=Review of Diabetic Studies |volume=4 |issue=1 |pages=13–24 |doi=10.1900/RDS.2007.4.13 |pmid=17565412 |url=http://www.soc-bdr.org/rds/archive/4/1_spring/review/genes_diet_and_type_2_diabetes/?showfulltext=1}}</ref><ref>{{cite journal |author=Haag, Marianne; & Dippenaar, Nola |year=2005 |title=Dietary fats, fatty acids and insulin resistance: short review of a multifaceted connection |journal=Medical Science Monitor |volume=11 |issue=12 |pages=RA359–367 |pmid=16319806}}</ref> ],<ref name="pmid12450898">{{cite journal |author=Sebastian A, Frassetto LA, Sellmeyer DE, Merriam RL, Morris RC Jr |title=Estimation of the net acid load of the diet of ancestral preagricultural Homo sapiens and their hominid ancestors |journal=American Journal of Clinical Nutrition |volume=76 |issue=6 |pages=1308–16 |year=2002 |pmid=12450898 |url=http://www.ajcn.org/cgi/content/full/76/6/1308 |month=Dec |day=01}}</ref><ref name="pmid16772638">{{cite journal |author=Morris RC Jr, Schmidlin O, Frassetto LA, Sebastian A |title=Relationship and interaction between sodium and potassium |journal=] |volume=25 |issue=3 |pages=262S–70S |year=2006 |month=June |pmid=16772638} |url=http://www.jacn.org/cgi/content/full/25/suppl_3/262S}}</ref> ]s,<ref name="pmid10489816">{{cite journal |author=Cordain, Loren |title=Cereal grains: humanity's double-edged sword |journal=World review of nutrition and dietetics |volume=84 |format=PDF| pages=19–73 |year=1999 |pmid=10489816 |url=http://www.thepaleodiet.com/articles/Cereal%20article.pdf |doi=10.1159/000059677}}</ref> ],<ref>{{cite book |title=Preventive Nutrition: The Comprehensive Guide for Health Professionals |editors=Bendich, Adrianne; Deckelbaum, Richard J |author=Bostick, Roberd M. |chapter=Diet and nutrition in the etiology and primary prevention of colon cancer |pages=47–98 |publisher=Humana Press |year=2001 |isbn=0896039110 |url=http://books.google.ca/books?id=iWFJ_2r4_wkC&printsec=frontcover&hl=fr#PPA48,M1}}</ref><ref name="pmid12714543">{{cite journal |author=Lawlor, Debbie A; & Ness, Andy R |title=Commentary: The rough world of nutritional epidemiology: Does dietary fibre prevent large bowel cancer? |journal=] |volume=32 |issue=2 |pages=239–43 |year=2003 |month=April |pmid=12714543 |doi=10.1093/ije/dyg060 |url=http://ije.oxfordjournals.org/cgi/content/full/32/2/239}}</ref><ref name="pmid16855539">{{cite journal |author=Leach, Jeff D. |title=Evolutionary perspective on dietary intake of fibre and colorectal cancer |journal=European Journal of Clinical Nutrition |volume=61 |issue=1 |pages=140–42 |year=2007 |month=January |pmid=16855539 |doi=10.1038/sj.ejcn.1602486 |url=http://www.paleobioticslab.com/evolution_fibre_colorectalcancer.htm}}</ref> ],<ref name="pmid11952477">{{cite journal |author=Cordain L, Eaton SB, Brand Miller J, Lindeberg S, Jensen C |year=2002 |month=April |title=An evolutionary analysis of the etiology and pathogenesis of juvenile-onset myopia |journal=Acta Ophthalmologica Scandinavica |volume=80 |issue=2 |pages=125–35 |pmid=11952477 |doi=10.1034/j.1600-0420.2002.800203.x |url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118927360/HTMLSTART}}</ref> ],<ref name="pmid12472346">{{cite journal |author=Cordain L, Lindeberg S, Hurtado M, Hill K, Eaton SB, ] |year=2002 |month=December |title=Acne vulgaris: a disease of Western civilization |journal=] |volume=138 |issue=12 |pages=1584–90 |pmid=12472346 |url=http://archderm.ama-assn.org/cgi/content/full/138/12/1584 |doi=10.1001/archderm.138.12.1584}}</ref><ref name="pmid16092796">{{cite journal |author=Cordain, Loren |year=2005 |month=June |title=Implications for the role of diet in acne |journal=Seminars in Cutaneous Medicine and Surgery |volume=24 |issue=2 |pages=84–91 |doi=10.1016/j.sder.2005.04.002 |pmid=16092796 |url=http://www.thepaleodiet.com/articles/Final%20Acne%20Article.pdf|format=PDF}}</ref><ref name=DermatologyReviewIIAcne>{{cite book |last=Cordain |first=Loren |editor=Bedlow, J. |title=US Dermatology Review 2006—Issue II |format= |year=2006 |publisher=Touch Briefings Publications |location=London |chapter=Dietary implications for the development of acne: a shifting paradigm (PDF) |chapterurl=http://www.thepaleodiet.com/articles/Cordain%20US%20Dermatology%20Reviews.pdf}}</ref><ref>{{cite journal |author=Keri, Jonette E; Nijhawan, Rajiv |month=August | year=2008 |title=Diet and acne |journal=Expert Review of Dermatology |volume=3 |issue=4 |pages=437–40 |doi=10.1586/17469872.3.4.437 |url=http://medgenmed.medscape.com/viewarticle/579326_print}}</ref> ],<ref>{{cite journal |author=Volker, Dianne; & NG, Jade |month=November | year=2006 |title=Depression: Does nutrition have an adjunctive treatment role? |journal=Nutrition & Dietetics |volume=63 |issue=4 |pages=213–226 |url=http://www.thefreelibrary.com/Depression:+does+nutrition+have+an+adjunctive+treatment+role%3F-a0156366457 |doi=10.1111/j.1747-0080.2006.00109.x |doi_brokendate=2009-02-15}} </ref> and ]s related to ] and ].<ref name="pmid10489816"/><ref name="pmid16087997">{{cite journal |author=Cunnane, Stephen C. |title=Origins and evolution of the Western diet: implications of iodine and seafood intakes for the human brain |journal=American Journal of Clinical Nutrition |volume=82 |issue=2 |year=2005 |month=August |pmid=16087997 |pages=483 |url=http://www.ajcn.org/cgi/content/full/82/2/483 |day=01}}</ref><ref>{{cite journal |author=Solomons, Noel W |year=2008 |title=National food fortification: a dialogue with reference to Asia: balanced advocacy |journal=Asia Pacific Journal of Clinical Nutrition |volume=17 |issue=Suppl 1 |pages=20–3 |pmid=18296293 |url=http://apjcn.nhri.org.tw/server/APJCN/Volume17/vol17suppl.1/20-23D2-1.pdf |format=PDF}}</ref><ref>{{cite journal |author=Friis, Henrik |month=February | year=2007 |title=International nutrition and health |journal=Danish Medical Bulletin |volume=54 |issue=1 |pages=55–7 |url=http://www.danmedbul.dk/DMB_2007/0107/0107-artikler/DMB3885.htm}}</ref> | |||
===Ancestral diet=== | |||
=== Macronutrient composition === | |||
{{further|Pleistocene human diet}} | |||
==== Protein and carbohydrates ==== | |||
Adopting the Paleolithic diet assumes that modern humans can reproduce the hunter-gatherer diet. Molecular biologist ] argues that "knowledge of the relative proportions of animal and plant foods in the diets of early humans is circumstantial, incomplete, and debatable and that there are insufficient data to identify the composition of a genetically determined optimal diet. The evidence related to Paleolithic diets is best interpreted as supporting the idea that diets based largely on plant foods promote health and longevity, at least under conditions of food abundance and physical activity."<ref>{{Harvnb|Nestle|2000}}.</ref> Ideas about ] are at best hypothetical.<ref>{{Harvnb|Milton|2002}}.</ref> | |||
The data for Cordain's book came from six contemporary hunter-gatherer groups, mainly living in marginal habitats. One of the studies was on the ], whose diet was recorded for a single month, and one was on the ].<ref>{{Harvnb|Ungar|Teaford|2002}}; {{Harvnb|Lee|1969}}; {{Harvnb|Eaton|Shostak|Konner|1988}}.</ref> Due to these limitations, the book has been criticized as painting an incomplete picture of the diets of Paleolithic humans.<ref>{{Harvnb|Ungar|Teaford|2002}}.</ref> It has been noted that the rationale for the diet does not adequately account for the fact that, due to the pressures of ], most modern domesticated plants and animals differ drastically from their Paleolithic ancestors; likewise, their nutritional profiles are very different from their ancient counterparts. For example, wild ] produce potentially fatal levels of ], but this trait has been bred out of domesticated varieties using artificial selection. Many vegetables, such as ], did not exist in the Paleolithic period; broccoli, ], ], and ] are modern ]s of the ancient species '']''.<ref>{{Harvnb|Jabr|2013}}.</ref> | |||
"The increased contribution of carbohydrate from grains to the human diet following the agricultural revolution has effectively diluted the protein content of the human diet."<ref>{{cite journal |author=Mann, Neil |month=September | year=2007 |title=Meat in the human diet: an anthropological perspective |journal=Nutrition & Dietetics |volume=64 |issue=4 |pages=S102–S107 |doi=10.1111/j.1747-0080.2007.00194.x |url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118523159/PDFSTART |format=PDF}}</ref> In modern hunter-gatherer diets, dietary protein is characteristically elevated (19–35% of energy) at the expense of carbohydrate (22–40% of energy).<ref name="pmid10702160"/><ref name="pmid11965522"/><ref name="pmid11101497">{{cite journal |author=Cordain L, Miller JB, Eaton SB, Mann N |title=Macronutrient estimations in hunter-gatherer diets |journal=American Journal of Clinical Nutrition |volume=72 |issue=6 |pages=1589–92 |year=2000 |month=December |pmid=11101497 |url=http://www.ajcn.org/cgi/content/full/72/6/1589 |day=01}}</ref> ]s may have a cardiovascular protective effect and may represent an effective weight loss strategy for the overweight or obese.<ref name="pmid15699220"/> Furthermore, ] may help prevent obesity and ],<ref name="pmid17684196">{{cite journal |author=Westman EC, Feinman RD, Mavropoulos JC, Vernon MC, Volek JS, Wortman JA, Yancy WS, Phinney SD |title=Low-carbohydrate nutrition and metabolism |journal=American Journal of Clinical Nutrition |volume=86 |issue=2 |pages=276–84 |year=2007 |month=August |pmid=17684196 |url=http://www.ajcn.org/cgi/content/full/86/2/276 |day=01}}</ref><ref name="pmid11965520">{{cite journal |author=Colagiuri, Stephen; & ] |title=The 'carnivore connection'—evolutionary aspects of insulin resistance |journal=European Journal of Clinical Nutrition |volume=56 |issue=1 |pages=S30–5 |year=2002 |month=March |pmid=11965520 |doi=10.1038/sj.ejcn.1601351 |url=http://www.nature.com/ejcn/journal/v56/n1s/pdf/1601351a.pdf |format=PDF}}</ref> as well as ].<ref name="pmid16540158"/> Carbohydrate deprivation to the point of ] may, however, cause adverse health effects.<ref>{{cite journal |author=Plaskett, L. G. |month=September | year=2003 |title=On the Essentiality of Dietary Carbohydrate |journal=Journal of Nutritional & Environmental Medicine |volume=13 |issue=3 |pages=161–168 |doi=10.1080/13590840310001619405}}</ref> | |||
Trying to devise an ideal diet by studying contemporary hunter-gatherers is difficult because of the great disparities that exist; for example, the animal-derived calorie percentage ranges from 25% for the ] of southern Africa to 99% for the Alaskan ]. Descendants of populations with different diets have different genetic adaptations to those diets, such as the ability to digest sugars from starchy foods. Modern hunter-gatherers tend to exercise considerably more than modern office workers, protecting them from heart disease and diabetes, though highly processed modern foods also contribute to diabetes when those populations move into cities.<ref>{{Harvnb|Gibbons|2014}}.</ref> | |||
The notion that preagricultural hunter-gatherers would have typically consumed a diet relatively low in carbohydrate and high in protein has been questioned.<ref name="doi10.1146/annurev.anthro.35.081705.123153">{{cite journal |title=Diet in Early ''Homo'': A Review of the Evidence and a New Model of Adaptive Versatility |journal=] |volume=35 |pages=209–228 |date=October 2006 |url=http://www.hopkinsmedicine.org/fae/PSUFEGMFT2006ARA.pdf |doi=10.1146/annurev.anthro.35.081705.123153 |author=Ungar, Peter S.; Grine, Frederick E.; & Teaford, Mark F.}}</ref> Critics argue that there is insufficient data to identify the relative proportions of plant and animal foods consumed on average by Paleolithic humans in general,<ref name="pmid12494313"/><ref name="isbn0897897366"/><ref name="doi10.1046/j.1467-3010.2000.00019.x"/><ref name=Strohle768/> and they stress the rich variety of ancient and modern hunter-gatherer diets.<ref name="isbn0897897366"/><ref name="Elton2008"/><ref name="pmid16997359"/> Furthermore, preagricultural hunter-gatherers may have generally consumed large quantities of carbohydrates in the form of carbohydrate-rich ]s (plant underground ]s).<ref name="Elton2008"/><ref name="pmid16997359"/><ref name="doi10.1079/PHN2006959"/> According to Staffan Lindeberg, an advocate of the Paleolithic diet, a plant-based diet rich in carbohydrates is consistent with the human ].<ref name=doi:10.1080/11026480510032043/><ref name=JNutriEnvironMed2003;13(3):149-160/> | |||
A 2018 review of the diet of hunter-gatherer populations found that the dietary provisions of the paleolithic diet had been based on questionable research, and were "difficult to reconcile with more detailed ethnographic and nutritional studies of hunter-gatherer diet".<ref>{{Harvnb|Pontzer|Wood|Raichlen|2018}}.</ref> | |||
It has also been argued that relative freedom from degenerative diseases was, and still is, characteristic of all hunter-gatherer societies irrespective of the ] characteristics of their diets.<ref name="pmid10702155"/><ref name="pmid11101497reply">{{cite journal |author=Milton, Katharine |title=Reply to L Cordain et al |journal=American Journal of Clinical Nutrition |volume=72 |issue=6 |pages=1590–92 |year=2000 |month=December |pmid=11101497 |url=http://www.ajcn.org/cgi/reprint/72/6/1589 |format=PDF |day=01}}</ref><ref name="pmid11157335">{{cite journal |author=Walker, Alexander RP |title=Are health and ill-health lessons from hunter-gatherers currently relevant? |journal=American Journal of Clinical Nutrition |volume=73 |issue=2 |pages=353–56 |year=2001 |month=February |pmid=11157335 |url=http://www.ajcn.org/cgi/content/full/73/2/353 |day=01}}</ref> According to ], a professor in the Department of Nutrition and Food Studies at ], judging from research relating nutritional factors to ] risks and to observations of exceptionally low chronic disease rates among people eating ], ] and ] diets, it seems clear that plant-based diets are most associated with ] and ].<ref name="pmid10466159"/><ref name="doi10.1046/j.1467-3010.2000.00019.x"/> | |||
Researchers have proposed that cooked starches met the energy demands of an increasing brain size, based on variations in the copy number of genes encoding ].<ref>{{Harvnb|Zimmer|2015}}; {{Harvnb|Hardy|Brand-Miller|Brown|Thomas|Copeland|2015}}.</ref> | |||
==== Fatty acids ==== | |||
==Health effects== | |||
Hunter-gatherer diets generally maintain relatively high levels of ] and ] fats, moderate levels of ]s (10–15% of total ]<ref name="isbn0849341809">{{cite book |last=Cordain |first=Loren |editor=Meskin, Mark S.; Bidlack, Wayne R.; & Randolph, R. Keith |title=Phytochemicals: Nutrient-Gene Interactions |year=2006 |publisher=] |isbn=0849341809 |pages=115–26 |chapter=Saturated fat consumption in ancestral human diets: implications for contemporary intakes (PDF) |chapterurl=http://www.thepaleodiet.com/articles/CRC%20Chapter%202006a.pdf}}</ref>) as well as a low ]:] ] ratio.<ref name="pmid15699220"/><ref>{{cite book |editors=Meskin, Mark S.; Bidlack, Wayne R.; & Randolph, R. Keith |title=Phytochemicals: Nutrient-Gene Interactions |chapter=Evolutionary aspects of diet, the omega-6:omega-3 ratio, and gene expression |author=Simopoulos, Artemis P. |year=2006 |pages=137–160 |publisher=] |isbn=0849341809}}</ref> Moreover, they are devoid of artificial ].<ref name="pmid15699220"/> These nutritional factors may serve to inhibit the development of cardiovascular disease.<ref name="pmid15699220"/> The ''Gale Encyclopedia of Diets'' recommends a low intake of red meat because it contains high levels of cholesterol, which may present health risks when consumed in excess.<ref name="isbn1414429916">Davidson, Helen. “Maker’s Diet. The Gale Encyclopedia of Diets: A Guide to Health and Nutrition. Thomas Gale, 2008. ISBN 1414429916</ref> | |||
The methodological quality of research into the paleolithic diet has been described as "poor to moderate".<ref>{{Harvnb|Pitt|2016}}; {{Harvnb|Obert|Pearlman|Obert|Chapin|2017}}.</ref> Some of the health claims made for it by its proponents, such as its ability to reverse ] and cure ] are exaggerated,<ref>{{Harvnb|Pitt|2016}}; {{Harvnb|Kolbert|2014}} : " proponents of the paleo diet make all sorts of claims for its efficacy. Some contend that it cures autoimmune diseases, others that it reverses diabetes."</ref> causing the diet to be controversial. | |||
Following the paleolithic diet results in the consumption of fewer processed foods, less sugar, and less salt. Reduced consumption of these elements is consistent with mainstream advice about diet.<ref>{{Harvnb|British Dietetic Association|2014}}.</ref> Diets with a paleolithic nutrition pattern also share some similarities with traditional ethnic diets, such as the ], which have been found to result in greater health benefits than the ].<ref>{{Harvnb|Tarantino|Citro|Finelli|2015}}; {{Harvnb|Katz|Meller|2014}}.</ref> Following the paleolithic diet can lead to ], such as those of vitamin{{nbsp}}D and calcium, which can in turn lead to compromised bone health.<ref>{{Harvnb|British Dietetic Association|2014}}; {{Harvnb|Pitt|2016}}.</ref> The increased fish consumption suggested by the diet can also lead to an elevated risk of exposure to toxins.<ref>{{Harvnb|Tarantino|Citro|Finelli|2015}}.</ref> | |||
=== Micronutrient density === | |||
There is some evidence that the diet can help in achieving ], due to the increased ] from the foods typically eaten.<ref>{{Harvnb|de Menezes|Sampaio|Carioca|Parente|2019}}.</ref> One trial of ] postmenopausal women found improvements in weight and fat loss after six months, but the benefits had ceased by 24 months. Side effects among these participants included "weakness, diarrhea, and headaches". As with any other diet regime, the paleolithic diet leads to weight loss because of overall decreased ], rather than any specific feature of the diet itself.<ref>{{Harvnb|Obert|Pearlman|Obert|Chapin|2017}}.</ref> | |||
]s (pictured above) are rich sources of micronutrients and protein.]] | |||
] (pictured above), are significant sources of essential micronutrients.]] | |||
There is no good evidence that following a paleolithic diet reduces the risk of ] or ],<ref>{{Harvnb|Ghaedi|Mohammadi|Mohammadi|Ramezani-Jolfaie|2019}}; {{Harvnb|Manheimer|van Zuuren|Fedorowicz|Pijl|2015}}.</ref> nor is there any evidence that the paleolithic diet is effective in treating ].<ref>{{Harvnb|Hou|Lee|Lewis|2014}}: "Even less evidence exists for the efficacy of the SCD, FODMAP, or Paleo diets. Furthermore, the practicality of maintaining these interventions over long periods of time is doubtful."</ref> | |||
Fruits, vegetables, lean meats, and seafood, which are staples of the hunter-gatherer diet, are more nutrient-dense than refined sugars, grains, vegetable oils, and dairy products. Consequently, the vitamin and mineral content of the diet is very high compared with a standard diet, in many cases a multiple of the ].<ref name=JAmNeutraceutAssoc2002;5:15-24/> Fish and seafood represent a particularly rich source of ]s and other micronutrients, such as ], ], ], ], and ], that are crucial for proper brain function and development.<ref name="pmid16087997"/> Terrestrial animal foods, such as muscle, brain, ], ], and other ], also represent a primary source of these nutrients.<ref name=ReplytoCunnane/> Calcium-poor grains and legumes are excluded from the diet.<ref>{{cite book |title=Nutritional Health: Strategies for Disease Prevention |chapter=Calcium intake and the prevention of chronic disease |editors=Wilson, Ted; Temple, Norman J. |author=Heaney, Robert P. |publisher=Humana Press |year=2001 |pages=31–50 |isbn=0896038645 |url=http://books.google.ca/books?id=FOR6-GlxdMEC&printsec=frontcover&hl=fr#PPA31,M1}}</ref><ref>{{cite journal |author=Heaney, Robert P. |month=August | year=2006 |title=Calcium intake and disease prevention |journal=Arquivos Brasileiros de Endocrinologia & Metabologia |volume=50 |issue=4 |pages=685–693 |doi=10.1590/S0004-27302006000400014 |url=http://www.scielo.br/scielo.php?pid=S0004-27302006000400014&script=sci_arttext&tlng=}}</ref><ref>{{cite book |title=Encyclopedia of Aging: A Comprehensive Resource in Gerontology and Geriatrics |chapter=Calcium metabolism |editor=Schulz, Richard |author=Heaney, Robert P. |publisher=Springer Publishing Company |year=2006 |pages=146–147 |isbn=0826148433 |url=http://books.google.ca/books?id=tgS29D0Mr4gC&printsec=frontcover&hl=fr#PPA146,M1}}</ref> The ''Gale Encyclopedia of Diets'' indicates that the Paleolithic diet is low in calcium.<ref name="isbn1414429916"/> | |||
The paleolithic diet similar to the ], in that it encourages the consumption of large amounts of ], especially meats high in ]. Increased consumption of red meat can lead to a higher incidence of cardiovascular disease.<ref>{{Harvnb|Longe|2008|p=182}}.</ref> | |||
=== Fiber content and glycemic load === | |||
==Proposed rationale and reception== | |||
Unrefined wild plant foods like those available to contemporary hunter-gatherers typically exhibit low ].<ref name="pmid12081815">{{cite journal |author=Foster-Powell K, Holt SH, ] |title=International table of glycemic index and glycemic load values: 2002. |journal=American Journal of Clinical Nutrition |volume=76 |issue=1 |pages=5–56 |year=2002 |pmid=12081815 |url=http://www.ajcn.org/cgi/content/full/76/1/5 |month=Jul |day=01}}</ref> Contemporary diets devoid of cereal grains, dairy products, refined oils and sugars, and ]s have been shown to contain significantly more fiber (~42.5 g/d) than either current or recommended values.<ref name=JAmNeutraceutAssoc2002;5:15-24/> Moreover, dairy products, such as milk, yoghurt, and cottage cheese, have low glycemic indices, but are highly insulinotropic, with an ] similar to that of white bread.<ref name="pmid11641749">{{cite journal |author=Liljeberg Elmståhl H.; & Björck, Inger ME |title=Milk as a supplement to mixed meals may elevate postprandial insulinaemia |journal=European journal of clinical nutrition |volume=55 |issue=11 |pages=994–99 |year=2001 |pmid=11641749 |doi=10.1038/sj.ejcn.1601259 |url=http://www.nature.com/ejcn/journal/v55/n11/pdf/1601259a.pdf |format=PDF}}</ref><ref name="pmid15788109">{{cite journal |author=Hoyt G, Hickey MS, Cordain L |title=Dissociation of the glycaemic and insulinaemic responses to whole and skimmed milk |journal=British Journal of Nutrition |volume=93 |issue=2 |pages=175–77 |year=2005 |pmid=15788109 |doi=10.1079/BJN20041304 |url=http://journals.cambridge.org/action/displayFulltext?type=6&fid=917920&jid=&volumeId=&issueId=02&aid=917916&fulltextType=RA&fileId=S000711450500022X}}</ref> These dietary characteristics may lower risk of diabetes, obesity and other related ] diseases by placing less stress on the ] to produce ], and preventing ].<ref name="pmid14527633">{{cite journal |author=Cordain L, Eades MR, Eades MD |title=Hyperinsulinemic diseases of civilization: more than just Syndrome X |journal=Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |volume=136 |issue=1 |pages=95–112 |year=2003 |pmid=14527633 |format=PDF| doi=10.1016/S1095-6433(03)00011-4 |url=http://www.thepaleodiet.com/articles/Hyperinsulinemic%20Diseases%20Final.pdf}}</ref> | |||
], co-author of a 1985 paper setting out a hypothetical basis for the paleolithic diet]] | |||
The stated rationale for the paleolithic diet is that human genes of modern times are unchanged from those of 10,000 years ago, and that the diet of that time is therefore the best fit with humans today.<ref>{{Harvnb|Obert|Pearlman|Obert|Chapin|2017}}.</ref> Loren Cordain has described the paleo diet as "the one and only diet that ideally fits our genetic makeup".<ref>{{Harvnb|Gibbons|2014}}.</ref> | |||
=== Sodium-potassium ratio and acid-base balance === | |||
The argument is that modern humans have not been able to adapt to the new circumstances.<ref>{{Harvnb|Carrera-Bastos|Fontes-Villalba|O'Keefe|Lindeberg|Cordain|2011}}.</ref> According to Cordain, before the agricultural revolution, hunter-gatherer diets rarely included grains, and obtaining milk from wild animals would have been "nearly impossible".<ref>{{Harvnb|Cordain|Eaton|Sebastian|Mann|2005}}</ref> Advocates of the diet argue that the increase in ] after the dawn of agriculture was caused by these changes in diet, but others have countered that it may be that pre-agricultural hunter-gatherers did not suffer from the diseases of affluence because they did not live long enough to develop them.<ref>{{Harvnb|Ungar|Grine|Teaford|2006}}.</ref> | |||
Since no ] or added salt are included the sodium intake (~726 mg) is lower than average U.S. values (3,271 mg) or recommended values (2,400 mg). Further, since potassium-rich fruits and vegetables comprise ~30% of the daily energy, the potassium content (~9,062 mg) is nearly 3.5 times greater than average values (2,620 mg) in the U.S. diet.<ref name=JAmNeutraceutAssoc2002;5:15-24/> The inverted ratio of potassium to sodium in the U.S. diet compared with preagricultural diets adversely affects cardiovascular function and contributes to ] and ].<ref name="pmid16772638"/><ref name="pmid18203914">{{cite journal |author=Frassetto LA, Morris RC Jr, Sellmeyer DE, Sebastian A |title=Adverse effects of sodium chloride on bone in the aging human population resulting from habitual consumption of typical American diets |journal=Journal of Nutrition |issue=2 |pages=419S–22S |year=2008 |month=February |pmid=18203914 |url= |volume=138}}</ref> | |||
According to the model from the evolutionary discordance hypothesis, "many ]s and ] evident in modern ] populations have arisen because of a mismatch between ] genes and modern lifestyles."<ref>{{Harvnb|Elton|2008|p=9}}.</ref> Advocates of the modern paleo diet have formed their dietary recommendations based on this hypothesis. They argue that modern humans should follow a diet that is nutritionally closer to that of their Paleolithic ancestors. | |||
Moreover, diets containing high amounts of salt induce and sustain increased acidity of body fluid, and net acid producing diets may contribute to the development of osteoporosis and ]s, loss of ], and age-related ]. Because of the absence of cereals and energy-dense, nutrient-poor foods, in the hunter-gatherer diet, foods that displace base-yielding fruits and vegetables, the diet produces a net base load on the body, as opposed to a net acid load.<ref name="pmid12450898"/><ref name=L.A.Frassetto22>{{cite journal |author=Frassetto LA, Morris RC Jr, Sebastian A |title=A practical approach to the balance between acid production and renal acid excretion in humans |journal=Journal of Nephrology |issue=19 |pages=33–40 |year=2006 |pmid=16736439 |url=http://www.sin-italy.org/vecchiosito/jnonline/Vol19S9/33.html}}</ref> | |||
The evolutionary discordance is incomplete, since it is based mainly on the genetic understanding of the human diet and a unique model of human ancestral diets, without taking into account the flexibility and variability of the human dietary behaviors over time.<ref>{{Harvnb|Turner|Thompson|2013}}.</ref> Studies of a variety of populations around the world show that humans can live healthily with a wide variety of diets and that humans have evolved to be flexible eaters.<ref>{{Harvnb|Leonard|2002}}.</ref> Lactase persistence, which confers ] into adulthood, is an example of how some humans have adapted to the introduction of dairy into their diet. While the introduction of grains, dairy, and legumes during the ] may have had some adverse effects on modern humans, if humans had not been nutritionally adaptable, these technological developments would have been dropped.<ref>{{Harvnb|Jabr|2013}}.</ref> | |||
=== Bioactive substances and antinutrients === | |||
Since the publication of Eaton and Konner's paper in 1985, analysis of the ] of primitive human remains has provided evidence that evolving humans were continually adapting to new diets, thus challenging the hypothesis underlying the paleothic diet.<ref>{{Harvnb|Whoriskey|2016}}.</ref> Evolutionary biologist ] writes that the idea that our genetic makeup today matches that of our ancestors is misconceived, and that in debate Cordain was "taken aback" when told that 10,000 years was "plenty of time" for an evolutionary change in human digestive abilities to have taken place. On this basis Zuk dismisses Cordain's claim that the paleo diet is "the one and only diet that fits our genetic makeup".<ref>{{Harvnb|Zuk|2013|p=114}}.</ref> | |||
Furthermore, cereal grains, legumes and milk contain ] substances, such as gluten and casein, which have been implicated in the development of various health problems.<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="doi10.1126/science.317.5835.175c"/> Consumption of ], a component of certain grains, such as ], ] and ], is known to have adverse health effects in individuals suffering from a range of ], including ]. Since the Paleolithic diet is devoid of cereal grains, it is ]. The paleodiet is also ]. ] is a protein found in milk and dairy products, which may impair glucose tolerance in humans.<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="doi10.1126/science.317.5835.175c"/> | |||
Paleoanthropologist ] has written that the paleo diet is a "myth", on account both of its invocation of a single suitable diet when in reality humans have always been a "work in progress", and because diet has always been varied because humans were spread widely over the planet.<ref>{{Harvnb|Ungar|2017}}.</ref> | |||
Compared to Paleolithic food groups, cereal grains and legumes contain high amounts of ], including ], ] inhibitors, ]s, ]s and ]s, substances known to interfere with the body's absorption of many key nutrients.<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="pmid16336696"/><ref name="pmid10489816"/> ] proteins, which are basically made up of strings of ]s that closely resemble those of another totally different protein, are also found in grains and legumes, as well as milk and dairy products.<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="pmid16336696"/><ref name="pmid10489816"/> Advocates of the Paleolithic diet have argued that these components of agrarian diets promote ] and ] and may explain the development of the "diseases of civilization" as well as a number of ].<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="pmid16336696"/><ref name="pmid10489816"/> | |||
Anthropological geneticist ] has said that humans have adapted in the last 10,000 years in response to radical changes in diet. In 2016, she was quoted as saying "It drives me crazy when Paleo-diet people say that we've stopped evolving—we haven't".<ref>{{Harvnb|Whoriskey|2016}}.</ref> | |||
==Research== | |||
===Archeological record=== | |||
Melvin Konner has said the challenge to the hypothesis is not greatly significant since the real challenges to human non-adaptation have occurred with the rise of ever-more refined foodstuffs in the last 300 years.<ref>{{Harvnb|Whoriskey|2016}}.</ref> | |||
One line of evidence used to support the Stone Age diet is the decline in human health and body mass that occurred with the adoption of agriculture, at the end of the Paleolithic era.<ref name="Elton2008">{{cite book |last=Elton |first=S. |editor=O’Higgins, P. & Elton, S. |title=Medicine and Evolution: Current Applications, Future Prospects |year=2008 |publisher=] |location=London |isbn=1420051342 |chapter=Environments, adaptations and evolutionary medicine: Should we be eating a ‘stone age’ diet?}}</ref><ref name="pmid10489816">{{cite journal |author=Cordain, Loren |title=Cereal grains: humanity's double-edged sword |journal=World review of nutrition and dietetics |volume=84 |format=PDF| pages=19–73 |year=1999 |pmid=10489816 |url=http://www.thepaleodiet.com/articles/Cereal%20article.pdf |doi=10.1159/000059677}}</ref> Associated with the introduction of domesticated and processed plant foods, such as cereal grains, in the human diet, there was, in many areas, a general decrease in body ] and dentition size, and an increase in ] rates. There was also an associated general decline in health in some areas.<ref name="pmid12494313"/><ref>{{cite journal |last=Larsen |first=Clark Spencer |title=Animal source foods and human health during evolution |journal=] |volume=133 |issue=11, Suppl 2 |pages=3893S–3897S |year=2003 |month=November |url=http://jn.nutrition.org/cgi/content/full/133/11/3893S |pmid=14672287 |day=01}}</ref><ref>{{cite journal |last=Hermanussen |first=Michael |year=2003 |month=July-September |title=Stature of early Europeans |journal=Hormones (Athens) |volume=2 |issue=3 |pages=175–8 |pmid=17003019 |url=http://hormones.gr/preview.php?c_id=127 |doi=10.1159/000079404}}</ref> | |||
==Environmental impact== | |||
===Observational studies=== | |||
A 2019 analysis of diets in the United States ranked consumption of a paleolithic diet as more environmentally harmful than consumption of an omnivorous diet, though not so harmful as a ].<ref>{{Harvnb|O'Malley|Willits-Smith|Aranda|Heller|2019}}.</ref> | |||
] has written the paleolithic diet's emphasis on meat consumption is a "disaster" on account of meat's comparatively high energy production costs.<ref>{{Harvnb|Kolbert|2014}}.</ref> | |||
Based on the subsistence patterns and ]s of hunter-gatherers studied in the last century, advocates argue that modern humans are well adapted to the diet of their Paleolithic ancestor.<ref name="isbn0521853761">{{cite book |last=Eaton |first=S. Boyd |coauthors=Cordain, Loren; & Sebastian, Anthony |editor=Aird, William C. |title=Endothelial Biomedicine |format= |year=2007 |publisher=] |isbn=0521853761 |pages=129–34 |chapter=The Ancestral Biomedical Environment (PDF) |chapterurl=http://www.thepaleodiet.com/articles/Ancestral%20Biomedical%20Environment%20Final.pdf}}</ref> The diet of modern hunter-gatherer groups is believed to be representative of patterns for humans of 50 to 25 thousand years ago,<ref name="isbn0521853761"/> and individuals from these and other technologically primitive societies,<ref name="pmid3135745">{{cite journal |author=Eaton SB, ], ] |title=Stone agers in the fast lane: chronic degenerative diseases in evolutionary perspective |journal=The American Journal of Medicine |volume=84 |issue=4 |pages=739–49 |year=1988 |month=April |pmid=3135745 |doi=10.1016/0002-9343(88)90113-1 |format=PDF |url=http://www.direct-ms.org/pdf/EvolutionPaleolithic/EatonStone%20Agers%20Fast%20Lane.pdf}}</ref><ref name="isbn0198504454">{{cite book |author=Eaton, S. Boyd & Eaton, Stanley. B 3rd |editor=Stearns, Stephen C. |title=Evolution in health and disease |year=1999 |publisher=] |location=Oxford |isbn=0198504454 |pages=251–59 |chapter=The evolutionary context of chronic degenerative diseases |chapterurl=}}</ref> including those individuals who reach the age of 60 or beyond,<ref name="pmid8450295">{{cite journal |author=Lindeberg, Staffan; & Lundh, Björn |title=Apparent absence of stroke and ischaemic heart disease in a traditional Melanesian island: a clinical study in Kitava |journal=Journal of Internal Medicine |volume=233 |issue=3 |pages=269–75 |year=1993 |month=March |pmid=8450295 |url=}}</ref><ref name="isbn0674950208">{{cite book |author=Trowell, Hugh C. & Burkett, Denis P. |title=Western diseases: their emergence and prevention |year=1981 |publisher=] |location=Cambridge, MA |isbn=0674950208 |pages=xiii–xvi |nopp=true}}</ref> seem to be largely free of the signs and symptoms of chronic disease (such as obesity, high blood pressure, nonobstructive coronary ], and ]) that universally afflict the elderly in western societies (with the exception of ], which afflicts both populations).<ref name=JNutriEnvironMed2003;13(3):149-160/><ref name="pmid11817904"/><ref name="isbn0521853761"/> Moreover, when these people adopt ]s, their health declines and they begin to exhibit signs and symptoms of "]".<ref name="isbn007140239X"/><ref name="isbn0521853761"/> In one ], ] and ] appeared to be absent in a population living on the island of ], in ], where a subsistence lifestyle, uninfluenced by ], was still maintained.<ref name="pmid8450295"/><ref name="pmid10535381">{{cite journal |author=Lindeberg S, Eliasson M, Lindahl B, Ahrén B |title=Low serum insulin in traditional Pacific Islanders—The Kitava study |journal=Metabolism |volume=48 |issue=10 |pages=1216–19 |year=1999 |month=October |pmid=10535381 |doi=10.1016/S0026-0495(99)90258-5 |url=}}</ref> | |||
==Popularity== | |||
One of the most frequent criticisms of the Paleolithic diet is that it is unlikely that preagricultural hunter-gatherers suffered from the ] simply because they did not live long enough to develop these illnesses, which are typically associated with old age.<ref name="doi10.1079/PHN2006959"/><ref name="pmid11817904"/><ref name=BookReviewSolomons>{{cite journal |author=Solomons, Noel W. |title=Book Review—Evolutionary Aspects of Nutrition and Health: Diet, Exercise, Genetics and Chronic Disease |journal=American Journal of Clinical Nutrition |volume=71 |issue=3 |pages=854–55 |year=2000 |month=March |url=http://www.ajcn.org/cgi/content/full/71/3/854 |day=01}}</ref><ref name="doi10.1017/S1368980007770568">{{cite journal |author=Cannon, Geoffrey |title=Drugs and bugs, and other stories |journal=Public Health Nutrition |volume=10 |issue=8 |pages=758–61 |year=2007 |month=August |doi=10.1017/S1368980007770568 |url=http://journals.cambridge.org/action/displayFulltext?type=6&fid=1191940&jid=&volumeId=&issueId=08&aid=1191896&fulltextType=ED&fileId=S1368980007770568}}</ref><ref name="isbn0393323277">{{cite book |title=The Quest for Immortality: Science at the Frontiers of Aging |year=2002 |publisher=W. W. Norton & Company |isbn=0393323277 |pages=188–191 |url=http://books.google.ca/books?id=hbe0Ge3QT9cC&printsec=frontcover&hl=fr#PPA188,M1 |author=Olshansky, S. Jay; Carnes, Bruce A.}}</ref> According to ] and Bruce Carnes, "there is neither convincing evidence nor scientific logic to support the claim that adherence to a paleolithic diet provides a longevity benefit."<ref name="isbn0393323277"/> In response to this argument, advocates of the paleodiet state that while Paleolithic hunter-gatherers did have a short average life expectancy, modern human populations with lifestyles resembling that of our preagricultural ancestors have little or no ], despite sufficient numbers of elderly.<ref name="pmid11817904"/><ref name=10.1017/S1368980007814492>{{cite journal |author=Leach, Jeff D. |title=Paleo Longevity Redux (Letters to the Editor) |journal=Public Health Nutrition |doi=10.1017/S1368980007814492 |url=http://journals.cambridge.org/action/displayFulltext?type=6&fid=1363380&jid=&volumeId=&issueId=11&aid=1363376&fulltextType=LP&fileId=S1368980007814492 |year=2007 |volume=10}}</ref> | |||
A lifestyle and ideology have developed around the diet.<ref>{{Harvnb|Goldstein|2010}}; {{Harvnb|Wilson|2015}}.</ref> "Paleolithic" products include clothing, ], and cookware. Many paleolithic cookery books have been bestsellers.<ref>{{Harvnb|Chang|Nowell|2016}}.</ref> | |||
{{asof|2019}} the market for products with the word "Paleo" in their name was worth approximately $US500 million, with strong growth prospects despite pushback from the scientific community. Some products were taking advantage of the trend by touting themselves as "paleo-approved" despite having no apparent link to the movement's tenets.<ref>{{Harvnb|Decker|2019}}.</ref> | |||
Critics further contend that food energy excess, rather than the consumption of specific novel foods, such as grains and dairy products, underlies the diseases of affluence.<ref name="doi10.1079/PHN2006959"/><ref name="Elton2008"/><ref name="pmid12469653"/> According to Geoffrey Cannon,<ref name="doi10.1079/PHN2006959"/> science and health policy advisor to the ], humans are designed to work physically hard to produce food for subsistence and to survive periods of ], and are not adapted to a diet rich in energy-dense foods.<ref name="pmid16277821">{{cite journal |author=Uauy, Ricardo; & Díaz, Erik |title=Consequences of food energy excess and positive energy balance |journal=Public Health Nutrition |volume=8 |issue=7A |pages=1077–99 |year=2005 |month=October |pmid=16277821 |doi=10.1079/PHN2005797 |url=http://journals.cambridge.org/action/displayFulltext?type=6&fid=634556&jid=&volumeId=&issueId=7a&aid=587328&fulltextType=RA&fileId=S1368980005001357}}</ref> Similarly, William R. Leonard, a professor of anthropology at ], states that the health problems facing industrial societies stem not from deviations from a specific ancestral diet but from an imbalance between calories consumed and calories burned, a state of energy excess uncharacteristic of ancestral lifestyles.<ref name="pmid12469653">{{cite journal |author=Leonard, William R. |title=Food for thought: Dietary change was a driving force in human evolution |journal=] |volume=287 |issue=6 |pages=106–15 |year=2002 |month=December |pmid=12469653 |url=http://www.clas.ufl.edu/users/krigbaum/proseminar/leonard_2002_SA.pdf |format=PDF}}</ref> | |||
Like many ], the paleolithic diet is promoted by some by an ] and a narrative of ] about how nutritional research, which does not support the supposed benefits of the paleolithic diet, is controlled by a malign ].<ref>{{Harvnb|NHS|2008}}; {{Harvnb|Kolbert|2014}}; {{Harvnb|Hall|2014}}: "Fad diets and 'miracle' diet supplements promise to help us lose weight effortlessly. Different diet gurus offer a bewildering array of diets that promise to keep us healthy and make us live longer: vegan, Paleo, Mediterranean, low fat, low carb, raw food, gluten-free the list goes on."</ref> Paleolithic diet advocate John Durant has blamed suppression of the truth about diet in the United States on "the vegetarian lobby".<ref>{{Harvnb|Kolbert|2014}}.</ref> | |||
===Intervention studies=== | |||
The first animal experiment on a Paleolithic diet suggested that this diet, as compared with a cereal-based diet, conferred higher ], lower ] and lower ] in 24 domestic pigs.<ref name="doi10.1186/1743-7075-3-39"> | |||
{{cite journal | |||
| author = Jönsson T & al. | |||
| title = A Paleolithic diet confers higher insulin sensitivity, lower C-reactive protein and lower blood pressure than a cereal-based diet in domestic pigs | |||
| journal = Nutrition & Metabolism | |||
| volume = 3 | issue = 39 | year = 2006 | |||
| pmid = 17081292 | doi = 10.1186/1743-7075-3-39 | |||
| url = http://www.nutritionandmetabolism.com/content/3/1/39 }} | |||
</ref> | |||
There was no difference in basal serum glucose.<ref name="doi10.1186/1743-7075-3-39"/> The first controlled human ] involved 29 people with glucose intolerance and it found that those on a Paleolithic diet had a greater improvement in ] compared to those on a ].<ref name="pmid17583796"> | |||
{{cite journal | |||
| author = Lindeberg S, Jönsson T, Granfeldt Y, Borgstrand E, Soffman J, Sjöström K, Ahrén B | |||
| title = A Palaeolithic diet improves glucose tolerance more than a Mediterranean-like diet in individuals with ischaemic heart disease | |||
| journal = Diabetologia | |||
| volume = 50 | issue = 9 | pages = 1795–807 | year = 2007 | month = September | |||
| pmid = 17583796 | doi = 10.1007/s00125-007-0716-y | |||
| url = http://www.springerlink.com/content/h7628r66r0552222/fulltext.pdf | format = PDF }} | |||
</ref><ref name="doi10.1126/science.317.5835.175c"> | |||
{{cite journal | |||
| date = July 13, 2007 | |||
| title = The Health Benefits of Paleocuisine | |||
| journal = ] | |||
| volume = 317 | issue = 5835 | pages = 175 | |||
| doi = 10.1126/science.317.5835.175c }} | |||
</ref><ref> | |||
{{cite journal | |||
| author = Magnusson, Per A | |||
| date = December 18, 2007 | |||
| title = Paleolitisk kost ger bättre glukostolerans än medelhavskost | |||
| journal = Läkartidningen | language = Swedish | |||
| volume = 104 | issue = 51–52 | pages = 3852 | |||
| url = http://www.lakartidningen.se/07engine.php?articleId=8376 }} | |||
</ref> | |||
Subsequently, a 3 week trial with the diet, in 20 healthy volunteers of which 6 dropped out and only 6 of the remaining had complete dietary information available, showed variable results. During the trial calorie consumption decreased 36% leading to significant weight loss. However adverse changes in serum calcium were observed.<ref name="pmid17522610"> | |||
{{cite journal | |||
| author = Osterdahl M, Kocturk T, Koochek A, Wändell PE | |||
| title = Effects of a short-term intervention with a paleolithic diet in healthy volunteers | |||
| journal = European Journal of Clinical Nutrition | |||
| volume = 62 | issue = 5 | year = 2008 | month = May | |||
| pmid = 17522610 | doi = 10.1038/sj.ejcn.1602790 | |||
| pages = 682–85 }} | |||
</ref> | |||
The ] Knowledge Service states that there are several limitations to the study and that "readers should not draw too many conclusions from it."<ref name="NHSChoices-9May2008"> | |||
{{cite news | |||
| author = ] | |||
| title = Caveman fad diet | |||
| url = http://www.nhs.uk/news/2008/05May/Pages/Cavemanfaddiet.aspx | |||
| work = NHS Choices | |||
| date = May 9, 2008 | accessdate = August 1, 2008 }} | |||
</ref> | |||
The Halford Watch refers to the study as "bad science".<ref> | |||
{{cite web | |||
| url = http://holfordwatch.info/2008/05/13/the-curse-of-the-paleolithic-diet-when-studies-go-bad/ | |||
| title = The Curse of the Paleolithic Diet: When Studies Go Bad "Holford Watch: Patrick Holford, nutritionism and bad science" | |||
| format = | work = | accessdate = }} | |||
</ref> | |||
Two ] designed to test various physiological effects of the Paleolithic diet are currently underway,<ref> | |||
{{cite web | |||
|url = http://clinicaltrials.gov/ct2/show/NCT00548782 | |||
| title = Paleolithic Diets and T2D | |||
| work = ] | |||
| publisher = ] | |||
| accessdate = November 6, 2008 }} | |||
</ref><ref> | |||
{{cite web | |||
| url = http://www.diabetes.ucsf.edu/EN/recent_news/hunter-gatherer_diet_may_help_prevent_and_treat_type_2_diabetes/ | |||
| title = Hunter-Gatherer Diet May Help Prevent and Treat Type 2 Diabetes | |||
| work = Diabetes Center News | |||
| publisher = Diabetes Center, University of California, San Francisco | |||
| accessdate = November 6, 2008 }} | |||
</ref><ref> | |||
{{cite web | |||
| url = http://clinicaltrials.gov/ct2/show/NCT00692536 | |||
| title = Diet Composition — Metabolic Regulation and Long-Term Compliance (KNOTA) | |||
| work = ] | |||
| publisher = ] | |||
| accessdate = November 6, 2008 }} | |||
</ref> | |||
and the results of two completed trials have not yet been reported.<ref> | |||
{{cite web | |||
| url = http://clinicaltrials.gov/ct2/show/NCT00360516 | |||
| title = Paleolithic Diet and Exercise Study | |||
| work = ] | |||
| publisher = ] | |||
| accessdate = November 6, 2008}} | |||
</ref><ref> | |||
{{cite web | |||
| url = http://clinicaltrials.gov/ct2/show/NCT00435240 | |||
| title = Paleolithic Diet in the Treatment of Diabetes Type 2 in Primary Health Care | |||
| work = ] | |||
| publisher = ] | |||
| accessdate = November 8, 2008}} | |||
</ref> | |||
== Sustainability == | |||
The Paleolithic diet has been criticized on the grounds that it cannot be implemented on a worldwide scale.<ref name=MoffatBookReview/><ref name="pmid16167639"/><ref name="pmid16167639reply">{{cite journal |author=Lindeberg, Staffan; & Norder, Stig |title=Replik: Paleolitisk kost är ett realistiskt alternativ |journal=] |language=Swedish |volume=102 |issue=34 |pages=2334 |date=August 22–28, 2005 |pmid=16167639 |format=PDF |url=http://www.lakartidningen.se/store/articlepdf/1/1852/LKT0534s2334_2334.pdf}}</ref> According to Loren Cordain, if such a diet was widely adopted, it would compromise the ] of populations dependent on cereal grains for their subsistence. However, he says that where cereals are not a necessity, as in most western countries, reverting to a grain-free diet can be highly practical in terms of cutting long-term healthcare costs.<ref name=faq>{{cite web |last=Cordain |first=Loren |title=Frequently Asked Questions |work=The Paleo Diet |url=http://www.thepaleodiet.com/faqs/ |accessdate=January 19, 2008}}</ref> ], a professor of anthropology at the ], states that less intensive farming techniques, such as pasture-grazed cattle, will not produce sufficient meat to feed the world’s population.<ref>{{cite journal |last=Pearson |first=Helen |title=Wild meat healthier than farmed cattle |publisher=] |date=March 26, 2002 |doi=10.1038/news020325-2}}</ref> On another level, critics have argued that exclusion diets such as the Stone Age diet "can be highly restrictive, socially disruptive, and expensive."<ref name="pmid10574865">{{cite journal |author=Vickers, Andrew; & Zollman, Catherine |year=1999 |month=November |title=ABC of complementary medicine. Unconventional approaches to nutritional medicine |journal=] |volume=319 |issue=7222 |pages=1419–22 |pmid=10574865 |url=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=10574865 |day=01}}</ref><ref name="Elton2008"/> | |||
==See also== | ==See also== | ||
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==Citations== | |||
{{Reflist}} | |||
== |
==References== | ||
{{refbegin}} | |||
*{{Cite journal |department=Ask EN |date=January 2010 |title=The modern take on the Paleo diet: is it grounded in science? |journal=Environmental Nutrition |issue=7 |url=https://universityhealthnews.com/topics/nutrition-topics/the-modern-take-on-the-paleo-diet-is-it-grounded-in-science/ |url-access=subscription |ref={{harvid|Ask EN|2010}}}} | |||
*{{Cite web |url=https://www.bda.uk.com/resource/top-5-worst-celebrity-diets-to-avoid-in-2015.html |title=Top 5 Worst Celebrity Diets to Avoid in 2015 |date=8 December 2014 |publisher=]|ref={{harvid|British Dietetic Association|2014}} |archive-url=https://web.archive.org/web/20201025032114/https://www.bda.uk.com/resource/top-5-worst-celebrity-diets-to-avoid-in-2015.html |archive-date=2020-10-25 |url-status=dead}} | |||
*{{Cite journal |vauthors=Carrera-Bastos P, Fontes-Villalba M, O'Keefe J, Lindeberg S, Cordain L |year=2011 |title=The western diet and lifestyle and diseases of civilization |url=https://www.dovepress.com/getfile.php?fileID=9163 |journal=Research Reports in Clinical Cardiology |pages=15 |doi=10.2147/RRCC.S16919 |doi-access=free}} | |||
*{{cite journal |vauthors=Chang ML, Nowell A |title=How to make stone soup: Is the "Paleo diet" a missed opportunity for anthropologists? |journal=Evol. Anthropol. |volume=25 |issue=5 |pages=228–31 |date=September 2016 |pmid=27753214 |doi=10.1002/evan.21504 |s2cid=12918685 }} | |||
*{{Cite journal|last1=Cordain|first1=Loren|last2=Eaton|first2=S. Boyd|last3=Sebastian|first3=Anthony|last4=Mann|first4=Neil|last5=Lindeberg|first5=Staffan|last6=Watkins|first6=Bruce A.|last7=O’Keefe|first7=James H.|last8=Brand-Miller|first8=Janette|year=2005|title=Origins and evolution of the Western diet: health implications for the 21st century|url=https://academic.oup.com/ajcn/article/81/2/341/4607411|journal=The American Journal of Clinical Nutrition|language=en|volume=81|issue=2|pages=341–54|doi=10.1093/ajcn.81.2.341|pmid=15699220|issn=0002-9165|doi-access=free}} | |||
*{{Cite journal |vauthors=Cunningham E |year=2012 |title=Are diets from paleolithic times relevant today? |journal=] |volume=112 |issue=8 |page=1296 |doi=10.1016/j.jand.2012.06.019 |pmid=22818735}} | |||
*{{cite journal |journal=Nutritional Outlook |title=Paleo Diet: Is the paleo diet here to stay, or a short-lived trend? |year=2019 |vauthors=Decker KJ |issue=4 |volume=22 |url=https://www.nutritionaloutlook.com/view/paleo-diet-paleo-diet-here-stay-or-short-lived-trend}} | |||
*{{cite journal |vauthors=de Menezes EV, Sampaio HA, Carioca AA, Parente NA, Brito FO, Moreira TM, de Souza AC, Arruda SP |title=Influence of Paleolithic diet on anthropometric markers in chronic diseases: systematic review and meta-analysis |journal=Nutr J |volume=18 |issue=1 |pages=41 |date=July 2019 |pmid=31337389 |pmc=6647066 |doi=10.1186/s12937-019-0457-z |type=Systematic review |doi-access=free }} | |||
*{{cite book |vauthors=Eaton SB, Shostak M, Konner M |title=The Paleolithic Prescription: A Program of Diet and Exercise and a Design for Living |publisher=] |year=1988 |page= |isbn=978-0060916350 |url-access=registration |url=https://archive.org/details/paleolithicpresc00eato/page/79 }} | |||
*{{Cite book |vauthors=Elton S |year=2008 |chapter=Environments, Adaptation, and Evolutionary Medicine: Should We be Eating a Stone Age Diet? |veditors=Elton S, O'Higgins P |title=Medicine and Evolution: Current Applications, Future Prospects |place=Boca Raton, FL |publisher=CRC Press |isbn=978-1-4200-5134-6}} | |||
*{{Cite book |vauthors=Fitzgerald M |url=https://books.google.com/books?id=Bh1bBAAAQBAJ&pg=PT38 |title=Diet Cults: The Surprising Fallacy at the Core of Nutrition Fads and a Guide to Healthy Eating for the Rest of Us |publisher=Pegasus Books |year=2014 |isbn=978-1-60598-595-4}} | |||
*{{cite journal |vauthors=Ghaedi E, Mohammadi M, Mohammadi H, Ramezani-Jolfaie N, Malekzadeh J, Hosseinzadeh M, Salehi-Abargouei A |title=Effects of a Paleolithic Diet on Cardiovascular Disease Risk Factors: A Systematic Review and Meta-Analysis of Randomized Controlled Trials |journal=Adv Nutr |volume=10 |issue=4 |pages=634–46 |date=July 2019 |pmid=31041449 |pmc=6628854 |doi=10.1093/advances/nmz007 }} | |||
*{{cite journal |journal=National Geographic Magazine |vauthors=Gibbons A |title=The Evolution of Diet |date=September 2014 |url=https://www.nationalgeographic.com/foodfeatures/evolution-of-diet/}} | |||
*{{Cite news |vauthors=Goldstein J |url=https://www.nytimes.com/2010/01/10/fashion/10caveman.html?_r=0 |title=The New Age Cavemen and the City |date=January 8, 2010 |work=]}} | |||
*{{Cite news |vauthors=Hall H |url=https://www.questia.com/read/1G1-394997140 |title=Food myths: what science knows (and does not know) about diet and nutrition |work=] |year=2014 |issue=4 |volume=19 |page=10 |author-link=Harriet A. Hall}} | |||
*{{cite journal |vauthors=Hardy K, Brand-Miller J, Brown KD, Thomas MG, Copeland L |title=The Importance of Dietary Carbohydrate in Human Evolution |journal=Q Rev Biol |volume=90 |issue=3 |pages=251–68 |date=September 2015 |pmid=26591850 |doi=10.1086/682587 |s2cid=28309169 |url=https://discovery.ucl.ac.uk/id/eprint/1470393/}} | |||
*{{cite news |vauthors=Hill R |year=1996 |title=Obituary: Dr Richard Mackarness |newspaper=The Independent |url=https://www.independent.co.uk/news/obituaries/obituary-dr-richard-mackarness-1303347.html}} | |||
*{{Cite journal |vauthors=Hou JK, Lee D, Lewis J |date=October 2014 |title=Diet and inflammatory bowel disease: review of patient-targeted recommendations |journal=] |type=Review |volume=12 |issue=10 |pages=1592–600 |doi=10.1016/j.cgh.2013.09.063 |pmc=4021001 |pmid=24107394 |quote=Even less evidence exists for the efficacy of the SCD, FODMAP, or Paleo diets. Furthermore, the practicality of maintaining these interventions over long periods of time is doubtful.}} | |||
*{{Cite web |vauthors=Jabr F |date=3 June 2013 |url=http://www.scientificamerican.com/article/why-paleo-diet-half-baked-how-hunter-gatherer-really-eat/ |title=How to Really Eat Like a Hunter-Gatherer: Why the Paleo Diet Is Half-Baked |website=]}} | |||
*{{Cite journal |vauthors=Johnson AR |date=2015 |title=The Paleo Diet and the American Weight Loss Utopia, 1975–2014 |journal=Utopian Studies|volume=26 |issue=1 |pages=101–124 |doi=10.5325/utopianstudies.26.1.0101 |publisher=Penn State University Press |s2cid=144735157 }} | |||
*{{Cite journal |vauthors=Katz DL, Meller S |year=2014 |title=Can we say what diet is best for health? |journal=] |volume=35 |pages=83–103 |doi=10.1146/annurev-publhealth-032013-182351 |pmid=24641555 |doi-access=free}} | |||
*{{cite magazine |vauthors=Kolbert E |magazine=The New Yorker |title=Stone Soup{{snd}}How the Paleolithic life style got trendy |date=20 July 2014 |url=https://www.newyorker.com/magazine/2014/07/28/stone-soup}} | |||
*{{cite journal |title=Kung Bushmen Subsistence: An Input-Output Analysis |journal=Contributions to Anthropology: Ecological Essays. Ottawa: National Museums of Canada |year=1969 |vauthors=Lee R |issue=230 |pages=73–94 }} | |||
*{{Cite journal |vauthors=Leonard WR |date=1 December 2002 |title=Food for Thought: Dietary change was a driving force in human evolution |doi=10.1038/scientificamerican1202-106 |url=http://www.scientificamerican.com/article/food-for-thought/ |access-date=20 January 2016 |url-access=subscription |journal=] |volume=287 |issue=6 |pages=106–15 |pmid=12469653}} | |||
*{{Cite book |vauthors=Longe JL |year=2008 |title=The Gale Encyclopedia of Diets: A Guide to Health and Nutrition |publisher=The Gale Group |isbn=978-1-4144-2991-5}} | |||
*{{Cite news |vauthors=Lowe K |date=20 July 2014 |url=http://seattletimes.com/html/health/2024082823_paleodietxml.html |title=A dissenting view on the Paleo Diet |work=] |access-date=17 March 2015}} | |||
*{{cite journal |vauthors=Manheimer EW, van Zuuren EJ, Fedorowicz Z, Pijl H |title=Paleolithic nutrition for metabolic syndrome: systematic review and meta-analysis |journal=Am. J. Clin. Nutr. |volume=102 |issue=4 |pages=922–32 |date=October 2015 |pmid=26269362 |pmc=4588744 |doi=10.3945/ajcn.115.113613 }} | |||
*{{Cite book |vauthors=Milton K |year=2002 |editor=Ungar, Peter S. |editor2=Teaford, Mark F. |title=Human Diet: Its Origins and Evolution |publisher=Bergin and Garvey |isbn=978-0-89789-736-5 |pages=111–122 |chapter=Hunter-gatherer diets: wild foods signal relief from diseases of affluence |chapter-url=http://nature.berkeley.edu/miltonlab/pdfs/humandiet.pdf |location=]}} | |||
*{{Cite journal |vauthors=Nestle M |date=March 2000 |title=Paleolithic diets: a sceptical view |journal=] |volume=25 |issue=1 |pages=43–47 |doi=10.1046/j.1467-3010.2000.00019.x |author-link1=Marion Nestle}} | |||
*{{cite book |vauthors=Newton DE |year=2019|title=Vegetarianism and Veganism: A Reference Handbook|publisher=ABC-CLIO|isbn=978-1-4408-6763-7}} | |||
*{{Cite web |ref={{harvid|NHS|2008}} |url=http://www.nhs.uk/news/2008/05May/Pages/Cavemanfaddiet.aspx |title=Caveman fad diet |date=9 May 2008 |website=Choices |publisher=] |archive-url=https://web.archive.org/web/20170725212012/http://www.nhs.uk:80/news/2008/05May/Pages/Cavemanfaddiet.aspx |archive-date=25 July 2017}} | |||
*{{Cite journal |vauthors=Obert J, Pearlman M, Obert L, Chapin S |year=2017 |title=Popular Weight Loss Strategies: a Review of Four Weight Loss Techniques |journal=Current Gastroenterology Reports |type=Review |volume=19 |issue=12 |pages=61 |doi=10.1007/s11894-017-0603-8 |pmid=29124370|s2cid=45802390 }} | |||
*{{cite journal |vauthors=O'Malley K, Willits-Smith A, Aranda R, Heller M, Rose D |title=Vegan vs Paleo: Carbon Footprints and Diet Quality of 5 Popular Eating Patterns as Reported by US Consumers |journal= Current Developments in Nutrition |volume=1 |issue=Supplement 1 |year=2019 |pages=nzz047.P03–007–19 |doi=10.1093/cdn/nzz047.P03-007-19|doi-access=free |pmc=6574879 }} | |||
*{{cite journal |vauthors=Pitt CE |title=Cutting through the Paleo hype: The evidence for the Palaeolithic diet |journal=Aust Fam Physician |volume=45 |issue=1 |pages=35–38 |date=2016 |pmid=27051985 }} | |||
*{{Cite journal|vauthors=Pontzer H, Wood BM, Raichlen DA |date=2018-12-01|title=Hunter-gatherers as models in public health |journal=]|volume=19|issue=Suppl 1 |pages=24–35 |issn=1467-789X |pmid=30511505 |s2cid=54489120 |url=https://escholarship.org/content/qt1m87g85c/qt1m87g85c.pdf?t=plqcrq |doi=10.1111/obr.12785 |doi-access=free}} | |||
*{{Cite web |vauthors=Shariatmadari D |date=22 October 2014 |url=https://www.theguardian.com/commentisfree/2014/oct/22/what-language-tells-us-about-stone-age-diet-linguistics |title=What language tells us about the roots of the stone age diet |website=] |access-date=17 March 2015}} | |||
*{{cite book |vauthors=Smith M |year=2015 |title=Another Person's Poison: A History of Food Allergy |publisher=Columbia University Press |isbn=978-0-231-16484-9}} | |||
*{{cite journal |vauthors=Tarantino G, Citro V, Finelli C |title=Hype or Reality: Should Patients with Metabolic Syndrome-related NAFLD be on the Hunter-Gatherer (Paleo) Diet to Decrease Morbidity? |journal=J Gastrointestin Liver Dis |volume=24 |issue=3 |pages=359–68 |date=September 2015 |pmid=26405708 |doi=10.15403/jgld.2014.1121.243.gta |type=Review}} | |||
*{{Cite journal |last1=Turner |first1=BL |last2=Thompson |first2=AL |year=2013 |title=Beyond the Paleolithic prescription: incorporating diversity and flexibility in the study of human diet evolution |journal=] |type=Review |volume=71 |issue=8 |pages=501–10 |doi=10.1111/nure.12039 |pmc=4091895 |pmid=23865796}} | |||
*{{Cite journal |vauthors=Ungar PS, Grine FE, Teaford MF |year=2006 |title=Diet in Early ''Homo'': A Review of the Evidence and a New Model of Adaptive Versatility |journal=] |volume=35 |issue=1 |pages=209–28 |doi=10.1146/annurev.anthro.35.081705.123153 |issn=0084-6570}} | |||
*{{cite book|vauthors=Ungar PS, Teaford MF |title=Human Diet: Its Origin and Evolution|url=https://books.google.com/books?id=6GDELypdTUcC&pg=PA67|date=1 January 2002|publisher=]|isbn=978-0-89789-736-5|pages=67–}} | |||
*{{cite journal |vauthors=Ungar PS |journal=] |title=The 'True' Human Diet |date=17 April 2017 |url=https://blogs.scientificamerican.com/guest-blog/the-true-human-diet/}} | |||
*{{Cite news |vauthors=Whoriskey P |date=7 March 2016 |title=Paleo-diet debates evolve into something bigger |newspaper=The Washington Post |url=https://www.washingtonpost.com/national/health-science/paleo-diet-debates-evolve-into-something-bigger/2016/03/07/792828ba-d690-11e5-be55-2cc3c1e4b76b_story.html}} | |||
*{{Cite news |vauthors=Wilson J |url=https://www.theguardian.com/commentisfree/2015/mar/16/paleo-isnt-a-fad-diet-its-an-ideology |title=Paleo isn't a fad diet, it's an ideology that selectively denies the modern world |date=March 16, 2015 |work=] |access-date=February 5, 2016}} | |||
*{{cite news|vauthors=Zimmer C|date=13 August 2015 |title=For Evolving Brains, a 'Paleo' Diet Full of Carbs |url=https://www.nytimes.com/2015/08/13/science/for-evolving-brains-a-paleo-diet-full-of-carbs.html|access-date=14 August 2015 |work=]}} | |||
*{{Cite book |vauthors=Zuk M |year=2013 |url=https://books.google.com/books?id=7iKwAgAAQBAJ |title=Paleofantasy: What Evolution Really Tells Us about Sex, Diet, and How We Live |publisher=W.W. Norton & Co |isbn=978-0-393-08137-4 |author-link=Marlene Zuk}} | |||
{{refend}} | |||
==Further reading== | |||
{{reflist|colwidth=30em}} | |||
{{refbegin}} | |||
* {{cite encyclopedia |encyclopedia=Encyclopedia of Diet Fads: Understanding Science and Society |edition=2nd |title=Paleo Diet |year=2014 |publisher=] |vauthors=Bijlefeld M, Zoumbaris SK |pages=164–166 |url=https://books.google.com/books?id=4jq2BQAAQBAJ&pg=PA164 |isbn=978-1-61069-760-6}} | |||
* {{cite web |vauthors=Gorski D |author-link=David Gorski |publisher=] |date=18 March 2013 |access-date=1 February 2015 |title=It's a part of my paleo fantasy, it's a part of my paleo dream |url=http://www.sciencebasedmedicine.org/its-a-part-of-my-paleo-fantasy-its-a-part-of-my-paleo-dream/}} | |||
*{{cite journal |vauthors=Henry AG, Brooks AS, Piperno DR |title=Plant foods and the dietary ecology of Neanderthals and early modern humans |journal=J. Hum. Evol. |volume=69 |pages=44–54 |date=April 2014 |pmid=24612646 |doi=10.1016/j.jhevol.2013.12.014 }} | |||
*{{Cite journal |vauthors=Konner M, Eaton S |year=2010 |title=Paleolithic Nutrition: Twenty-Five Years Later |journal=] |volume=25 |issue=6 |pages=594–602 |doi=10.1177/0884533610385702 |pmid=21139123}} | |||
*{{Cite journal |vauthors=Osborne DL, Hames R |year=2014 |title=A life history perspective on skin cancer and the evolution of skin pigmentation |journal=] |volume=153 |issue=1 |pages=1–8 |url=http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1056&context=anthropologyfacpub |issn=0002-9483 |doi=10.1002/ajpa.22408 |pmid=24459698 |s2cid=13175245}} | |||
*{{Cite journal |vauthors=Ramsden C, Faurot K, Carrera-Bastos P, Cordain L, De Lorgeril M, Sperling L |year=2009 |title=Dietary Fat Quality and Coronary Heart Disease Prevention: A Unified Theory Based on Evolutionary, Historical, Global, and Modern Perspectives |journal=Current Treatment Options in Cardiovascular Medicine |volume=11 |issue=4 |pages=289–301 |pmid=19627662 |pmc=10150942 |s2cid=1058038 |doi=10.1007/s11936-009-0030-8}} | |||
{{refend}} | |||
==External links== | |||
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Latest revision as of 03:04, 11 November 2024
Fad diet based on the presumed diet of Paleolithic humans This article is about a modern-day diet. For information on the dietary practices of Paleolithic humans, see Paleolithic § Diet and nutrition.
The Paleolithic diet, Paleo diet, caveman diet, or Stone Age diet is a modern fad diet consisting of foods thought by its proponents to mirror those eaten by humans during the Paleolithic era.
The diet avoids food processing and typically includes vegetables, fruits, nuts, roots, and meat and excludes dairy products, grains, sugar, legumes, processed oils, salt, alcohol, and coffee. Historians can trace the ideas behind the diet to "primitive" diets advocated in the 19th century. In the 1970s, Walter L. Voegtlin popularized a meat-centric "Stone Age" diet; in the 21st century, the best-selling books of Loren Cordain popularized the Paleo diet. As of 2019 the paleo-diet industry was worth approximately US$500 million.
In the 21st century, the sequencing of the human genome and DNA analysis of the remains of early humans have found evidence that humans evolved rapidly in response to changing diet. This evidence undermines a core premise of the paleolithic diet – that human digestion has remained essentially unchanged over time. Palaeontological evidence has indicated that prehistoric humans ate plant-heavy diets that regularly included grains and other starchy vegetables, in contrast to the claims of the Paleo diet.
Advocates promote the paleolithic diet as a way of improving health. There is some evidence that following it may lead to improvements in body composition and metabolism compared with the typical Western diet or compared with diets recommended by some European nutritional guidelines. On the other hand, following the diet can lead to nutritional deficiencies, such as an inadequate calcium intake, and side effects can include weakness, diarrhea, and headaches.
History and terminology
Adrienne Rose Johnson writes that the idea that the primitive diet was superior to current dietary habits dates back to the 1890s with such writers as Emmet Densmore and John Harvey Kellogg. Densmore proclaimed that "bread is the staff of death", while Kellogg supported a diet of starchy and grain-based foods in accord with "the ways and likings of our primitive ancestors". Arnold DeVries advocated an early version of the Paleolithic diet in his 1952 book, Primitive Man and His Food. In 1958, Richard Mackarness authored Eat Fat and Grow Slim, which proposed a low-carbohydrate "Stone Age" diet.
In his 1975 book The Stone Age Diet, gastroenterologist Walter L. Voegtlin advocated a meat-based diet, with low proportions of vegetables and starchy foods, based on his declaration that humans were "exclusively flesh-eaters" until 10,000 years ago.
In 1985 Stanley Boyd Eaton and Melvin Konner published a controversial article in the New England Journal of Medicine proposing that modern humans were biologically very similar to their primitive ancestors and so "genetically programmed" to consume pre-agricultural foods. Eaton and Konner proposed a "discordance hypothesis" by which the mismatch between modern diet and human biology gave rise to lifestyle diseases, such as obesity and diabetes.
The diet started to become popular in the 21st century, where it attracted a largely internet-based following using web sites, forums and social media.
This diet's ideas were further popularized by Loren Cordain, a health scientist with a Ph.D. in physical education, who trademarked the words "The Paleo Diet" and who wrote a 2002 book of that title.
In 2012 the paleolithic diet was described as being one of the "latest trends" in diets, based on the popularity of diet books about it; in 2013 and 2014 the Paleolithic diet was Google's most searched weight-loss method.
The paleolithic or paleo diet is also sometimes referred to as the caveman or Stone Age diet.
Foodstuffs
The basis of the diet is a re-imagining of what Paleolithic people ate, and different proponents recommend different diet compositions. Eaton and Konner, for example, wrote a 1988 book The Paleolithic Prescription with Marjorie Shostak, and it described a diet that is 65% plant-based. This is not typical of more recently devised paleo diets; Loren Cordain's – probably the most popular – instead emphasizes animal products and avoidance of processed food. Diet advocates concede the modern paleolithic diet cannot be a faithful recreation of what paleolithic people ate, and instead aim to "translate" that into a modern context, avoiding such likely historical practices as cannibalism.
Foodstuffs that have been described as permissible include:
- "vegetables, fruits, nuts, roots, meat, and organ meats";
- "vegetables (including root vegetables), fruit (including fruit oils, e.g., olive oil, coconut oil, and palm oil), nuts, fish, meat, and eggs, and it excluded dairy, grain-based foods, legumes, extra sugar, and nutritional products of industry (including refined fats and refined carbohydrates)"; and
- "avoids processed foods, and emphasizes eating vegetables, fruits, nuts and seeds, eggs, and lean meats".
The diet forbids the consumption of all dairy products. This is because milking did not exist until animals were domesticated after the Paleolithic era.
Ancestral diet
Further information: Pleistocene human dietAdopting the Paleolithic diet assumes that modern humans can reproduce the hunter-gatherer diet. Molecular biologist Marion Nestle argues that "knowledge of the relative proportions of animal and plant foods in the diets of early humans is circumstantial, incomplete, and debatable and that there are insufficient data to identify the composition of a genetically determined optimal diet. The evidence related to Paleolithic diets is best interpreted as supporting the idea that diets based largely on plant foods promote health and longevity, at least under conditions of food abundance and physical activity." Ideas about Paleolithic diet and nutrition are at best hypothetical.
The data for Cordain's book came from six contemporary hunter-gatherer groups, mainly living in marginal habitats. One of the studies was on the !Kung, whose diet was recorded for a single month, and one was on the diet of the Inuit. Due to these limitations, the book has been criticized as painting an incomplete picture of the diets of Paleolithic humans. It has been noted that the rationale for the diet does not adequately account for the fact that, due to the pressures of artificial selection, most modern domesticated plants and animals differ drastically from their Paleolithic ancestors; likewise, their nutritional profiles are very different from their ancient counterparts. For example, wild almonds produce potentially fatal levels of cyanide, but this trait has been bred out of domesticated varieties using artificial selection. Many vegetables, such as broccoli, did not exist in the Paleolithic period; broccoli, cabbage, cauliflower, and kale are modern cultivars of the ancient species Brassica oleracea.
Trying to devise an ideal diet by studying contemporary hunter-gatherers is difficult because of the great disparities that exist; for example, the animal-derived calorie percentage ranges from 25% for the Gwi people of southern Africa to 99% for the Alaskan Nunamiut. Descendants of populations with different diets have different genetic adaptations to those diets, such as the ability to digest sugars from starchy foods. Modern hunter-gatherers tend to exercise considerably more than modern office workers, protecting them from heart disease and diabetes, though highly processed modern foods also contribute to diabetes when those populations move into cities.
A 2018 review of the diet of hunter-gatherer populations found that the dietary provisions of the paleolithic diet had been based on questionable research, and were "difficult to reconcile with more detailed ethnographic and nutritional studies of hunter-gatherer diet".
Researchers have proposed that cooked starches met the energy demands of an increasing brain size, based on variations in the copy number of genes encoding amylase.
Health effects
The methodological quality of research into the paleolithic diet has been described as "poor to moderate". Some of the health claims made for it by its proponents, such as its ability to reverse diabetes and cure autoimmune diseases are exaggerated, causing the diet to be controversial.
Following the paleolithic diet results in the consumption of fewer processed foods, less sugar, and less salt. Reduced consumption of these elements is consistent with mainstream advice about diet. Diets with a paleolithic nutrition pattern also share some similarities with traditional ethnic diets, such as the Mediterranean diet, which have been found to result in greater health benefits than the Western diet. Following the paleolithic diet can lead to nutritional deficiencies, such as those of vitamin D and calcium, which can in turn lead to compromised bone health. The increased fish consumption suggested by the diet can also lead to an elevated risk of exposure to toxins.
There is some evidence that the diet can help in achieving weight loss, due to the increased satiety from the foods typically eaten. One trial of obese postmenopausal women found improvements in weight and fat loss after six months, but the benefits had ceased by 24 months. Side effects among these participants included "weakness, diarrhea, and headaches". As with any other diet regime, the paleolithic diet leads to weight loss because of overall decreased caloric intake, rather than any specific feature of the diet itself.
There is no good evidence that following a paleolithic diet reduces the risk of cardiovascular disease or metabolic syndrome, nor is there any evidence that the paleolithic diet is effective in treating inflammatory bowel disease.
The paleolithic diet similar to the Atkins diet, in that it encourages the consumption of large amounts of red meat, especially meats high in saturated fat. Increased consumption of red meat can lead to a higher incidence of cardiovascular disease.
Proposed rationale and reception
The stated rationale for the paleolithic diet is that human genes of modern times are unchanged from those of 10,000 years ago, and that the diet of that time is therefore the best fit with humans today. Loren Cordain has described the paleo diet as "the one and only diet that ideally fits our genetic makeup".
The argument is that modern humans have not been able to adapt to the new circumstances. According to Cordain, before the agricultural revolution, hunter-gatherer diets rarely included grains, and obtaining milk from wild animals would have been "nearly impossible". Advocates of the diet argue that the increase in diseases of affluence after the dawn of agriculture was caused by these changes in diet, but others have countered that it may be that pre-agricultural hunter-gatherers did not suffer from the diseases of affluence because they did not live long enough to develop them.
According to the model from the evolutionary discordance hypothesis, "many chronic diseases and degenerative conditions evident in modern Western populations have arisen because of a mismatch between Stone Age genes and modern lifestyles." Advocates of the modern paleo diet have formed their dietary recommendations based on this hypothesis. They argue that modern humans should follow a diet that is nutritionally closer to that of their Paleolithic ancestors.
The evolutionary discordance is incomplete, since it is based mainly on the genetic understanding of the human diet and a unique model of human ancestral diets, without taking into account the flexibility and variability of the human dietary behaviors over time. Studies of a variety of populations around the world show that humans can live healthily with a wide variety of diets and that humans have evolved to be flexible eaters. Lactase persistence, which confers lactose tolerance into adulthood, is an example of how some humans have adapted to the introduction of dairy into their diet. While the introduction of grains, dairy, and legumes during the Neolithic Revolution may have had some adverse effects on modern humans, if humans had not been nutritionally adaptable, these technological developments would have been dropped.
Since the publication of Eaton and Konner's paper in 1985, analysis of the DNA of primitive human remains has provided evidence that evolving humans were continually adapting to new diets, thus challenging the hypothesis underlying the paleothic diet. Evolutionary biologist Marlene Zuk writes that the idea that our genetic makeup today matches that of our ancestors is misconceived, and that in debate Cordain was "taken aback" when told that 10,000 years was "plenty of time" for an evolutionary change in human digestive abilities to have taken place. On this basis Zuk dismisses Cordain's claim that the paleo diet is "the one and only diet that fits our genetic makeup".
Paleoanthropologist Peter Ungar has written that the paleo diet is a "myth", on account both of its invocation of a single suitable diet when in reality humans have always been a "work in progress", and because diet has always been varied because humans were spread widely over the planet.
Anthropological geneticist Anne C. Stone has said that humans have adapted in the last 10,000 years in response to radical changes in diet. In 2016, she was quoted as saying "It drives me crazy when Paleo-diet people say that we've stopped evolving—we haven't".
Melvin Konner has said the challenge to the hypothesis is not greatly significant since the real challenges to human non-adaptation have occurred with the rise of ever-more refined foodstuffs in the last 300 years.
Environmental impact
A 2019 analysis of diets in the United States ranked consumption of a paleolithic diet as more environmentally harmful than consumption of an omnivorous diet, though not so harmful as a ketogenic diet.
Elizabeth Kolbert has written the paleolithic diet's emphasis on meat consumption is a "disaster" on account of meat's comparatively high energy production costs.
Popularity
A lifestyle and ideology have developed around the diet. "Paleolithic" products include clothing, smartphone apps, and cookware. Many paleolithic cookery books have been bestsellers.
As of 2019 the market for products with the word "Paleo" in their name was worth approximately $US500 million, with strong growth prospects despite pushback from the scientific community. Some products were taking advantage of the trend by touting themselves as "paleo-approved" despite having no apparent link to the movement's tenets.
Like many other diets, the paleolithic diet is promoted by some by an appeal to nature and a narrative of conspiracy theories about how nutritional research, which does not support the supposed benefits of the paleolithic diet, is controlled by a malign food industry. Paleolithic diet advocate John Durant has blamed suppression of the truth about diet in the United States on "the vegetarian lobby".
See also
- List of historical cuisines
- List of diets
- Low-carbohydrate diet
- Modern primitive
- Nutritional genomics
- Paleoconservatism
- Paleo Foundation
- Peganism
- Pleistocene human diet
- Raw foodism
Citations
- de Menezes et al. 2019: "The Paleolithic diet has been gaining ground in the field of fad diets. It is based on food patterns of human Paleolithic ancestors, about 2.6 million to 10,000 years ago, a period that precedes the advent of industrial agriculture and is different from today's modern society".
- British Dietetic Association 2014 - "The Paleo diet (also known as the Paleolithic Diet, the Caveman diet and the Stone Age Diet) is a diet where only foods presumed to be available to Neanderthals in the prehistoric era are consumed and all other foods, such as dairy products, grains, sugar, legumes, 'processed' oils, salt, and others like alcohol or coffee are excluded."
- Ask EN 2010; Johnson 2015; Fitzgerald 2014.
- Decker 2019.
- Whoriskey 2016; Zuk 2013, p. 133: "No one can legitimately claim to have found the only 'natural' diet for humans. We simply ate too many different foods in the past, and have adapted to new ones".
- "Science debunks a misleading myth about the paleo diet". Inverse. 20 February 2024. Retrieved 6 November 2024.
- Wong, Kate (1 July 2024). "To Follow the Real Early Human Diet, Eat Everything". Scientific American. Retrieved 6 November 2024.
- Henry, Amanda G.; Brooks, Alison S.; Piperno, Dolores R. (11 January 2011). "Microfossils in calculus demonstrate consumption of plants and cooked foods in Neanderthal diets (Shanidar III, Iraq; Spy I and II, Belgium)". Proceedings of the National Academy of Sciences. 108 (2): 486–491. doi:10.1073/pnas.1016868108. ISSN 0027-8424. PMC 3021051. PMID 21187393.
- Dein, Simon (7 October 2022). "The myth of the golden past: Critical perspectives on the paleo diet". Anthropology of Food. doi:10.4000/aof.13805. ISSN 1609-9168.
- Challa, Hima J.; Bandlamudi, Manav; Uppaluri, Kalyan R. (2024), "Paleolithic Diet", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 29494064, retrieved 6 November 2024
- NHS 2008.
- Katz & Meller 2014.
- Manheimer et al. 2015.
- For calcium deficicency see Tarantino, Citro & Finelli 2015; for other risks see Obert et al. 2017.
- Johnson 2015.
- Newton 2019, p. 102.
- Hill 1996; Smith 2015, p. 117: "Mackarness, who founded the first British National Health Service clinical ecology clinic in Basingstoke, pioneered the so-called Stone Age Diet, in the belief that humans had not evolved to consume foods, including wheat and milk, developed since Paleolithic times (in fact, today's weight-reduction version of Mackarness's Stone Age diet is called the 'Paleo diet')."
- Zuk 2013, pp. 111–112.
- Johnson 2015.
- Chang & Nowell 2016.
- Ask EN 2010. For Cordain's qualifications see Chang & Nowell 2016. For trademarking see Lowe 2014.
- Cunningham 2012.
- Chang & Nowell 2016.
- Shariatmadari 2014.
- Chang & Nowell 2016.
- Kolbert 2014.
- Tarantino, Citro & Finelli 2015.
- Manheimer et al. 2015.
- Katz & Meller 2014.
- Longe 2008, p. 180: "No dairy products are allowed while on this diet. This means no milk, cheese, butter, or anything else that comes from milking animals. This is because milking did not occur until animals were domesticated, sometime after the Paleolithic age. Eggs are allowed however, because Paleolithic man would probably have found eggs in bird's nests during foraging and hunting."
- Nestle 2000.
- Milton 2002.
- Ungar & Teaford 2002; Lee 1969; Eaton, Shostak & Konner 1988.
- Ungar & Teaford 2002.
- Jabr 2013.
- Gibbons 2014.
- Pontzer, Wood & Raichlen 2018.
- Zimmer 2015; Hardy et al. 2015.
- Pitt 2016; Obert et al. 2017.
- Pitt 2016; Kolbert 2014 : " proponents of the paleo diet make all sorts of claims for its efficacy. Some contend that it cures autoimmune diseases, others that it reverses diabetes."
- British Dietetic Association 2014.
- Tarantino, Citro & Finelli 2015; Katz & Meller 2014.
- British Dietetic Association 2014; Pitt 2016.
- Tarantino, Citro & Finelli 2015.
- de Menezes et al. 2019.
- Obert et al. 2017.
- Ghaedi et al. 2019; Manheimer et al. 2015.
- Hou, Lee & Lewis 2014: "Even less evidence exists for the efficacy of the SCD, FODMAP, or Paleo diets. Furthermore, the practicality of maintaining these interventions over long periods of time is doubtful."
- Longe 2008, p. 182.
- Obert et al. 2017.
- Gibbons 2014.
- Carrera-Bastos et al. 2011.
- Cordain et al. 2005
- Ungar, Grine & Teaford 2006.
- Elton 2008, p. 9.
- Turner & Thompson 2013.
- Leonard 2002.
- Jabr 2013.
- Whoriskey 2016.
- Zuk 2013, p. 114.
- Ungar 2017.
- Whoriskey 2016.
- Whoriskey 2016.
- O'Malley et al. 2019.
- Kolbert 2014.
- Goldstein 2010; Wilson 2015.
- Chang & Nowell 2016.
- Decker 2019.
- NHS 2008; Kolbert 2014; Hall 2014: "Fad diets and 'miracle' diet supplements promise to help us lose weight effortlessly. Different diet gurus offer a bewildering array of diets that promise to keep us healthy and make us live longer: vegan, Paleo, Mediterranean, low fat, low carb, raw food, gluten-free the list goes on."
- Kolbert 2014.
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- Whoriskey P (7 March 2016). "Paleo-diet debates evolve into something bigger". The Washington Post.
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- Zuk M (2013). Paleofantasy: What Evolution Really Tells Us about Sex, Diet, and How We Live. W.W. Norton & Co. ISBN 978-0-393-08137-4.
Further reading
- Bijlefeld M, Zoumbaris SK (2014). "Paleo Diet". Encyclopedia of Diet Fads: Understanding Science and Society (2nd ed.). ABC-CLIO. pp. 164–166. ISBN 978-1-61069-760-6.
- Gorski D (18 March 2013). "It's a part of my paleo fantasy, it's a part of my paleo dream". Science-Based Medicine. Retrieved 1 February 2015.
- Henry AG, Brooks AS, Piperno DR (April 2014). "Plant foods and the dietary ecology of Neanderthals and early modern humans". J. Hum. Evol. 69: 44–54. doi:10.1016/j.jhevol.2013.12.014. PMID 24612646.
- Konner M, Eaton S (2010). "Paleolithic Nutrition: Twenty-Five Years Later". Nutrition in Clinical Practice. 25 (6): 594–602. doi:10.1177/0884533610385702. PMID 21139123.
- Osborne DL, Hames R (2014). "A life history perspective on skin cancer and the evolution of skin pigmentation". American Journal of Physical Anthropology. 153 (1): 1–8. doi:10.1002/ajpa.22408. ISSN 0002-9483. PMID 24459698. S2CID 13175245.
- Ramsden C, Faurot K, Carrera-Bastos P, Cordain L, De Lorgeril M, Sperling L (2009). "Dietary Fat Quality and Coronary Heart Disease Prevention: A Unified Theory Based on Evolutionary, Historical, Global, and Modern Perspectives". Current Treatment Options in Cardiovascular Medicine. 11 (4): 289–301. doi:10.1007/s11936-009-0030-8. PMC 10150942. PMID 19627662. S2CID 1058038.
External links
- Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016).
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