Review Article
Ferrous versus Ferric Oral Iron Formulations for the Treatment of Iron Deficiency: A Clinical Overview
Table 1
Differences between bivalent and trivalent oral iron preparations.
| Iron supplement | Comments |
| Bivalent | | Ferrous fumarate (Fe2+) | More adverse effects if not in a prolonged-release formulation | Ferrous gluconate (Fe2+) | Ferrous sulphate (Fe2+) | Ferrous glycine sulphate (Fe2+) | |
| Trivalent | Poorer absorption | Iron protein succinylate (Fe3+) | More expensive | Iron polymaltose complex (Fe3+) | A greater number of intakes |
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