Why do Iron and Calcium interact?

Calcium significantly reduces iron absorption by up to 50% The interaction is significant.

Iron + Calcium

Q: Can I take Iron with Calcium?

Not without care. Calcium significantly reduces iron absorption by up to 50% Take at least 2 hours apart

Can you take Iron and Calcium together? Here's what the science shows.

Significant InteractionIngredientMD curated

Iron and Calcium have a significant interaction. Calcium significantly reduces iron absorption by up to 50%

Bottom line: Take at least 2 hours apart

How They Interact

Calcium significantly reduces iron absorption by up to 50%

Timing

Take at least 2 hours apart

What to do about it

Take at least 2 hours apart

This is a clinically significant interaction. Consult your healthcare provider before combining these.

Evidence Sources

IngredientMD curated interaction database

Common Questions

Iron and Calcium have some interaction to consider. Calcium significantly reduces iron absorption by up to 50% Take at least 2 hours apart

Compare Side-by-Side

Iron vs Calcium: what each one is for

Related Interactions

Magnesium + Calcium Zinc + Copper Iron + Zinc Calcium + Vitamin D Magnesium + Vitamin D Zinc + Vitamin C

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Every ingredient page carries the interactions, cautions and timing behind entries like this one.

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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. Always consult with a healthcare provider before making changes to your supplement regimen, especially if you take medications.