Of the ferric salts, ferric ammonium citrate is used in various formulations. However, bioavailability of iron from these salts is considered 3-4 times less than ferrous compounds(1). Iron amino acid chelates are other group of iron preparations available. Better bioavailability is claimed with these salts as absorption is not interfered with by dietary phytates(1). In clinical studies in young children and infants equal rise in Hb is reported with these salts compared to ferrous sulfate. Side effects with iron-amino acid chelates are less frequent(5).


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