Supports Electrolyte Balance* Nutrition for Healthy Thyroid Function* Potassium 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 the thyroid secretions that regulate cellular metabolism and energy production.* NOW® Potassium plus Iodine also supplies Potassium, a mineral that is essential for the maintenance of healthy water and electrolyte balance, as well as whole body pH.* Natural color variation may occur in this product.