Why do Vitamin C and Iron interact?

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

Vitamin C + Iron

Q: Can I take Vitamin C with Iron?

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

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

Significant InteractionIngredientMD curated

Vitamin C and Iron have a significant interaction. Calcium blocks iron absorption by up to 50%

Bottom line: Take at least 2 hours apart

How They Interact

Calcium blocks 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

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

Compare Side-by-Side

Vitamin C vs Iron: what each one is for

Related Interactions

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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.