Can You Take Casein Protein and Iron Together?

May affect absorption

The short answer

Casein protein may bind iron through its phosphopeptide groups, potentially reducing iron absorption when taken together.

How to arrange timing

Consider separating casein protein and iron by 2 hours.

Reference

Reference noted for this combination: Hurrell RF et al., Am J Clin Nutr 1989; NatMed Pro

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.