Onferrous bisglycinate mechanism of action Dec. 2, 2015, Taiwan Food and Drug Administration (TFD75 mg ferrous fumarate elemental ironA) announced relevanoral ferrous gluconatet regulations whicferrous gluconate (fergon)h have further limited the volume of foods in tablet and capsule forms which can be purchased for personal use from overseas. The new regulation came into effect on Dec. 1ferrous sulfate make you gain weight, 2015.