Can I Take These?

Can You Take Calcium and Potassium Together?

No documented interaction was identified between calcium and potassium in the sources reviewed.

No documented interaction identifiedEvidence: Moderate

See the full Calcium page and Potassium page for other reviewed interactions and reference information.

What the interaction means

The NIH Office of Dietary Supplements' potassium fact sheet mentions calcium only in the context of low dietary potassium being associated with lower bone calcium over time (a nutrition-education point, not a supplement-interaction claim). The calcium fact sheet's interactions section does not mention potassium at all.

No documented interaction between Calcium and Potassium 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 NIH fact sheets were checked directly; neither documents a supplement-interaction between them.

What the sources say

Potassium — Consumer — NIH Office of Dietary SupplementsCalcium — Consumer — NIH Office of Dietary Supplements

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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