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Vitamin C for colds — the evidence
The Cochrane evidence: regular vitamin C does not prevent colds in the general population, and starting it after symptoms begin does not shorten the cold. It may shave a little off the duration for people under heavy physical stress (marathoners, soldiers in winter training).
Ką rodo įrodymai
Verdict: No clear evidence. The Cochrane evidence: regular vitamin C does not prevent colds in the general population, and starting it after symptoms begin does not shorten the cold. It may shave a little off the duration for people under heavy physical stress (marathoners, soldiers in winter training).
Ką iš tikrųjų daryti
An orange is always fine; megadosing at the first sniffle is not the lever. What actually matters is what vitamin C supports generally — a normal diet covers it, and deficiency in this region is rare.
Source: Cochrane — vitamin C for preventing and treating the common cold (CD000980) · checked 2026-09-07
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