Potassium benzoate is a synthetic compound in some foods and drinks. Very small amounts can be safe to consume. Many foods, cosmetics, pharmaceuticals, and hygiene products contain potassium benzoate.

Potassium iodide (KI) is a salt that can help protect you from radioactive iodine. Your thyroid gland is the part of your body that’s most sensitive to radioactive iodine. Potassium iodide can help ...