Can you take Calcium and Chromium together?
Some evidence suggests calcium carbonate can reduce chromium absorption. Separating them is an easy precaution.
Severity
Caution
Evidence
limited
Timing
Separate by 2+ hours as a precaution.
How it works
The antacid effect of calcium carbonate may alter chromium solubility and reduce its bioavailability in the gut.
In vitro evidence suggests calcium carbonate can bind chromium, but the clinical significance at normal supplement doses remains uncertain. The interaction appears specific to carbonate forms — calcium citrate may not have the same effect.
What to do
Take chromium at a different meal from calcium supplements. If your calcium is citrate rather than carbonate, the risk is likely negligible.
Frequently asked
Should I separate Calcium and Chromium?
Consider separating them. Separate by 2+ hours as a precaution. Consult a healthcare professional for personalised advice.
Why do Calcium and Chromium interact?
The antacid effect of calcium carbonate may alter chromium solubility and reduce its bioavailability in the gut.
How strong is the evidence for this interaction?
The evidence is limited. This interaction is based on theoretical mechanisms or a small number of studies.
About these supplements
Other Calcium interactions
Other Chromium interactions
Related reading
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1 flagZinc and Iron compete for the same absorption pathway. Take at least 2 hours apart.
Supplements
This information is for educational purposes only. It is not medical advice and does not diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional.