Liquid Ionic Iron is an essential mineral for optimal health. Research indicates that it plays an important role in proper enzyme and cognitive function, energy production, and optimal immune system function.† 46-day supply, 22mg/serving of Iron Sulfate. Ionic Single Minerals from Trace Minerals Research® combines high-quality single mineral ingredients and over 72 trace minerals and elements from ConcenTrace® in a unique new proprietary process. This unique blend gives the body the type of minerals that it readily recognizes and absorbs fast because of its liquid Ionic state†. Each bottle comes with a metered dropper which allows for variable dosing. Health care providers recommend different doses, depending on your needs. The metered dropper allows for these recommendations to be followed, where a normal tablet or capsule does not.