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Can vitamin C stop a cold?
"Research has found no evidence that vitamin C prevents colds," says Dr Hasmukh Joshi, vice-chair of the Royal College of GPs.
In 2013, an updated review of studies into vitamin C and the common cold concluded that "regular ingestion of vitamin C had no effect on common cold incidence in the ordinary population". The review results suggested that vitamin C might help prevent colds in people exposed to short periods of intense physical activity, such as marathon runners or skiers, but not in the general population.
A daily dose of vitamin C did slightly reduce the length and severity of colds in the ordinary population. When it comes to flu, one person in three believes that taking vitamin C can cure the flu virus.
It can’t. "Studies found that vitamin C offers a very, very limited benefit," says Dr Joshi. "I wouldn't recommend it."
"Researchers reviewed 29 trials with 11,306 participants who either took vitamin C or a placebo. While they found that regular use of vitamin C had no effect on common cold prevention in the general population, an analysis of 31 studies covering 9,745 cases of colds, did show a small, but consistent effect of vitamin C in reducing the duration of symptoms. A regular dose of 1 g or more per day of vitamin C reduced duration of colds by 8 percent in adults and 18 percent in kids. " jeżeli nie jesteś dzieckiem dodatkową suplementację witaminą C możesz sobie darować, korzyści są bliskie błędu statystycznego