Can You Take Caffeine and Iron Together?

May affect absorption

The short answer

Caffeine and its polyphenols can reduce non-heme iron absorption by 39–90% when consumed simultaneously.

How to arrange timing

Space caffeine intake at least 1–2 hours from iron supplements.

Reference

Reference noted for this combination: NIH ODS 2024

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.