Vitamin C prevents and treats the common cold in the general population.

Is it true that vitamin C prevents and treats the common cold in the general population?

Partly. Several reviews and pooled analyses report that regular vitamin C supplementation does not reduce common cold incidence in the general population, while a few sources claim it alleviates symptoms or has biological effects. The evidence covers only parts of the claim and does not settle prevention and treatment together.

Verdict: CONTESTED PARTIAL · 3 sources for, 5 against · Last checked 2 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Harri, H. (1996). Vitamin C supplementation and common cold symptoms: problems with inaccurate reviews. zenodo.org. https://doi.org/10.1016/s0899-9007(96)00223-7

Harri, H. (1997). Vitamin C intake and susceptibility to the common cold. zenodo.org. https://doi.org/10.1017/s0007114500002889

Mufliha, A. (2019). Persepsi Masyarakat terhadap Vitamin C  sebagai Wujud Penanggulangan Common Cold. doi.org. https://doi.org/10.31227/osf.io/v9a7x

Harri, H. (2024). Misleading statements about vitamin C and the common cold in article on treatments for common cold in children by Gill et al. (2024). zenodo.org. https://doi.org/10.5281/zenodo.20305130

Vitamin C in the Prevention and Treatment of the Common Cold - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1177/1559827616629092

Harri, H. (1997). Vitamin C supplementation and the common cold: was Linus Pauling right or wrong?. zenodo.org. https://doi.org/10.5281/zenodo.6406112

Harri, H. & S, H. Z. (2003). Vitamin C and the common cold: a retrospective analysis of Chalmers' review [in Chinese]. zenodo.org. https://doi.org/10.5281/zenodo.6469735

Harri, H. (2017). Vitamin C and Infections. zenodo.org. https://doi.org/10.3390/nu9040339