This well-tolerated form of iron is produced through a special process that binds (chelates) iron to two glycine amino acids, forming iron bisglycinate, a well-absorbed form of this essential mineral. Studies show ferrous bisglycinate is better absorbed than ferrous sulfate, ferrous gluconate, and other common inorganic forms of iron.* Supplies 30 mg elemental iron per capsule. Three Brands Become One: Since 1969, Klaire Labs has been dedicated to developing clean, efficacious nutritional supplements to ensure optimal outcomes for even the most sensitive individuals. This enduring commitment to quality is at the root of the unification with sister brands ProThera and Complementary Prescriptions. These three brands have unified with a modernized look based on the legacy Klaire Labs logo.