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Does vitamin C help prevent or treat the common cold? Maybe not, after all.

on runners.

What about vitamin C as a possible treatment for an established cold? The authors found seven trials (all in adults) evaluating whether vitamin C taken when their symptoms started would shorten the cold. When they looked at all seven studies together, they found no benefit from taking the vitamin. But in one of the seven trials, patients took a single very high dose of the vitamin (8 g) on the day their symptoms started and experienced a shorter illness compared with people who took a placebo pill. (3) The authors say that the results in this single trial are "tantalising and deserve further assessment."

Douglas and Hemilä's article summarizes their more detailed review of the evidence that is published by the Cochrane Library (see www.cochrane.org) and that is freely available via the PLoS Medicine website.


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Source:PLoS


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