Thyroid SupportSupports Electrolyte BalanceNutrition for Healthy Thyroid FunctionNon-GMOA Dietary SupplementVegetarian/VeganMineralsFamily Owned Since 1968GMP Quality AssuredPotassium Iodide (KI) is a compound that contains Iodine, a nutrient necessary for normal thyroid function. Iodine, in the form of Iodide, is an integral part of thyroid secretions that regulate cellular metabolism and energy production. NOW Potassium Plus Iodide also supplies Potassium, a mineral that is essential for the maintenance of healthy water and electrolyte balance, as well as whole body pH.