Thyroid Support! Supports Electrolyte Mineral Balance, Nutrition For Healthy Thyroid Function! Safe Iodide Potency! Support Electrolyte Mineral Balance! 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 thyroid hormones, which regulate cellular metabolism and energy production. NOW Potassium Iodide Plus also supplies Potassium, a mineral that is essential for the maintenance of healthy water balance and whole body pH. Note: Manufacturers continually change product specifications. While we try our best to keep product descriptions up to date, they do not necessarily reflect the latest information available from the manufacturer. We are not responsible for incorrect or outdated product descriptions and/or images.