Evidence-based nutrition, in plain English — every entry sourced from clinical research.

Vitamin C for preventing and treating the common cold

The Cochrane database of systematic reviews, 2013 · Systematic review & meta-analysis

Across the trials reviewed, regular vitamin C did not prevent colds in the general population but modestly shortened their duration; taking it after onset did not help.

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A note on health content. This article is for general information and is not a substitute for professional medical or dietetic advice. Where we cite research, links to the original papers are provided so you can read the evidence yourself.

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