From Manufacturer''s Label:Used in the body in several different ways**, Iodine is an important mineral.Each serving of Ionic Iodine delivers 225 mcg of iodine from potassium iodide.In addition, over 72 ionic trace minerals from ConcenTrace is included in each serving.Variable dosing available with the metered dropper included with each bottle. The metered dropper allows for your unique recommended dose by a health care provider to be followed, where a normal tablet or capsule does not.* 225 mcg of iodine per serving* Non-GMO* Vegan2 oz. liquid.320 servings per bottle.Manufactured by: Trace Minerals Research