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Potassium iodide (KI) and potassium iodate (KIO₃) are called thyroid blockers when used in radiation protection.

If a person consumes a dose of one of these chemical compounds, his or her thyroid may saturate with stable iodine, preventing accumulation of radioactive iodine found after a nuclear meltdown or explosion.

References

1. "Facts about potassium iodide". Centers for Disease Control and Prevention. 2022-04-07. Retrieved 2022-10-05.
2. Iodine Thyroid Blocking: Guidelines for Use in Planning for and Responding to Radiological and Nuclear Emergencies. World Health Organization. 2017 – via NCBI Bookshelf.
3. "Frequently Asked Questions About Potassium Iodide". U.S. Nuclear Regulatory Commission. April 19, 2021. Retrieved 2022-10-05.
4. World Health Organisation (2011) Use of potassium iodide for thyroid protection during nuclear or radiological emergencies

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