Myth-buster
Calcium supplements tied to worse cognition in a new meta-analysis of stroke survivors — but not in the general population.
This is one of the first reviews to flag a possible cognitive downside to calcium in a specific clinical group, so it should raise a question mark, not trigger a change in habits — the evidence for healthy adults is still separate and much stronger.
A systematic review of 34 studies in stroke survivors found that calcium supplementation was associated with negative cognitive outcomes, alongside butter and sugar intake. However, the same review found no effect from other dietary strategies on cognition, and the results come from a clinical population — meaning they don't apply to healthy people taking calcium for bone health.
Where this fits in the evidence
This is among the first studies we've indexed on Calcium for Worsened Cognitive Function — treat it as an early signal until more research accumulates.
The study
- Meta-Analysis
- 2025-05-10
- Advances in nutrition (Bethesda, Md.)
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.