Iodine is an important mineral that is used in the body in several different ways. Ionic Iodine is a rich, concentrated liquid dietary supplement that provides 225mcg per serving of iodine from potassium iodide. It may help support the following: healthy thyroid function, hormone production, central nervous system function, and immune function. We are America's #1 Trace Minerals Supplement Brand. Since 1972, Trace Minerals' branded products have been recognized around the world as the pioneer of ionic trace mineral products that have supported consumers in living healthy lives. Our products are third-party tested to give you the highest quality product with maximum absorption. Feel the difference with Trace Minerals!