is the most popular iron supplement. There are about 65 mg of elemental iron in a 325 mg ferrous sulfate tablet. Ferrous gluconate is 12% elemental iron, while ferrous fumarate is 33% elemental iron.
Nevertheless, a variety of factors can obstruct the assimilation of iron in the body, including a deficiency in vitamin C. As a result, it points to the necessity for supplements rich in vitamin C.