Proferrin ES is a Dietary Iron Supplement that is Made in the USA by Colorado Biolabs, Inc. Each Tablet contains 10.5 mg of Iron as Proferrin Heme Iron Polypeptide. Heme is a natural form of iron derived from USDA edible red blood cells and is intended for individuals seeking to maintain normal iron levels. Recommended Use: Take one tablet up to three times daily, with or without food. Proferrin ES should be stored at room temperature. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.