Analysis of the iron state in iron containing vitamins and dietary supplements by Mossbauer spectroscopy

An analysis of iron in some commercial products of vitamins and dietary supplements containing ferrous fumarate, ferrous bisglycinate chelate (Ferrochel®) and ferrous sulfate was made by Mossbauer spectroscopy. Various ferric and ferrous impurities were found. Two vitamin products contained major iron compounds that did not correspond to ferrous fumarate or ferrous bisglycinate chelate announced by the manufacturer.