Potassium iodide (KI) is a chemical compound, medication, and dietary supplement. It serves several important purposes:

1. Thyroid Protection in Radiation Emergencies:

   • During a nuclear emergency, radioactive iodine may be released into the air.

   • KI helps protect the thyroid gland by preventing it from absorbing radioactive iodine.

   • It is recommended for use in radiation emergencies despite potential risks during pregnancy.

2. Dietary Supplement:

   • KI is used as a nutritional supplement in animal feeds and human diets.

   • It is commonly added to table salt to prevent iodine deficiency in populations with limited seafood consumption.