Trace Minerals Research Ionic Iodine Dietary Supplement Description From Potassium Iodide 225 mcg Hormones - Nerves - Immunity Gluten Free Non GMO Certified Vegan cGMP Made in USA America's #1 Trace Mineral Brand Ionic Iodine is a rich, concentrated liquid dietary supplement that provides 225 mcg of iodine from potassium iodide per serving. The metered dropper allows for personalized dosing, when needed. Iodine is an important mineral that is used in the body in several different ways. It may help support the following: healthy thyroid function, hormone production, central nervous system function, and immune function