Vitamin C
debunked vitamin C for colds — popular belief, evidence says otherwise
Evidence by outcome
cold preventionstudied, no effectmoderate certainty— no reduction in cold incidence in the general population
People say · Evidence shows
“Vitamin C prevents colds”
contradictsextremefolk
What changed
- C → null-result (2026-04-12) — Meta-analysis confirmed no prevention benefit in the general population; regraded to null-result.
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sources: PMID:00000008