ThyroSafe is the ONLY FDA approved Potassium Iodide (KI) tablet with 65 mg. strength. This is essential for promptly dosing children who are always more at risk than adults. Each packet provides 20, 65 mg. tablets. Adult dose=2 tablets daily, 10 day protection. Child dose=1 tablet (3+ yrs), 20 day protection. KI protects your thyroid from radioactive iodine.