ByDr. Brennan Commerford, D.C.·Last reviewed: July 2026
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Ferrous Fumarate: verification pending

We’re confirming the science for this compound before we publish a form ranking. Our team reviews every ranked page against peer-reviewed absorption data — this one is still under review, so we are not showing a score yet.

Check back soon. Rankings are reviewed by Dr. Brennan Commerford, D.C.

References

  1. Human RCT in pregnant women: ferrous fumarate at more than double the elemental dose achieved serum iron increases comparable-to-or-lower than lower-dose ferrous bisglycinate. PubMed
  2. Review: ferrous fumarate is bioequivalent to ferrous sulfate in adults (relative bioavailability ~100) but absorbed at only about 30% of the sulfate level in young children. PubMed
  3. Isotope study in preschool children: iron absorption from ferrous sulfate (~7.9%) exceeded ferrous fumarate (~2.4%). PubMed

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.