Can You Take Iron and Resistant Starch Together?

May affect absorption

The short answer

Resistant Starch is an insoluble fiber that resists digestion in the upper GI tract and may physically adsorb iron, reducing its bioavailability when taken simultaneously.

How to arrange timing

Separate resistant starch and iron supplements by at least 2 hours for optimal absorption.

Reference

Reference noted for this combination: NIH ODS; NatMed Pro Fiber Monograph; Torre M et al., Crit Rev Food Sci Nutr 1991

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.