Can You Take Caffeine and Iron Together?
No documented interaction was identified between caffeine and iron in the sources reviewed.
See the full Caffeine page and Iron page for other reviewed interactions and reference information.
What the interaction means
MedlinePlus's caffeine page does not mention iron (checked specifically for the separately-documented non-heme-iron-absorption phenomenon; this page does not make that claim). Iron's own NIH fact sheet does not mention caffeine.
No documented interaction between Caffeine and Iron was identified in the authoritative sources reviewed. This is not a guarantee that no interaction exists for every dose, formulation, or individual -- it means the sources checked did not document one.
Practical context
Both substances' own current authoritative sources were checked directly, full text, in both directions -- this catalog only publishes claims a current source in the reviewed hierarchy actually states, even when a related phenomenon is otherwise well known in nutrition literature.
What the sources say
Last reviewed 2026-08-23
Medical information disclaimer: this information is general and educational. It does not diagnose conditions, prescribe treatment, or determine whether a combination is safe for you personally. Follow your prescription label and ask a pharmacist or clinician before starting, stopping, or combining products. Full disclaimer.
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- Iron and Vitamin B12Insufficient evidence
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- Iron and ProbioticsInsufficient evidence
- Iron and CopperInsufficient evidence
- Iron and MetforminInsufficient evidence
- Iron and CreatineInsufficient evidence
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- Iron and LisinoprilInsufficient evidence
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- Iron and Vitamin KInsufficient evidence
- Iron and TurmericInsufficient evidence
- Iron and MelatoninInsufficient evidence
- Iron and CoQ10 (Coenzyme Q10)Insufficient evidence
- Iron and Folate / Folic AcidInsufficient evidence
- Iron and SpironolactoneInsufficient evidence
- Iron and St. John's WortInsufficient evidence
- Iron and Omega-3 / Fish OilInsufficient evidence
- Iron and Vitamin EInsufficient evidence
- Iron and AshwagandhaInsufficient evidence
- Iron and LosartanInsufficient evidence
- Iron and AspirinInsufficient evidence
- Iron and AmlodipineInsufficient evidence
- Iron and IbuprofenInsufficient evidence
- Iron and EscitalopramInsufficient evidence
- Iron and Vitamin CInformational