Vitamin C Good for Common Colds
The recent Cochrane Review shows that vitamin C supplements may benefit people experiencing heavy physical stress and reduce the incidence of common colds. Researchers found that in various randomized trials consisting of different populations like schoolchildren, marathon runners, swimmers, and soldiers who experienced short-term physical stress, vitamin C supplementation reduced the incidence of colds by half. Furthermore, it was shown in a recent randomized trial that vitamin C decreased the duration of colds by half in male adolescent swimmers, although supplementation had no effect on female participants.
Studies have shown that regular doses of vitamin C of at least one gram per day could shorten the average duration of colds in children by 18 percent and in adults by 8 percent. However, experts do not advise taking vitamin C daily to shorten the duration of colds which occur infrequently, with adults and experiencing only a few episodes per year.
Researchers reveal that there have been only a few therapeutic trials using vitamin C in people whose cold symptoms have just appeared, and results have been inconsistent. However, since studies involving the use of the vitamin as supplements have consistently shown that it reduces the duration and severity of colds, the authors believe it may be useful as well for therapeutic purposes in patients with common colds. Besides this, vitamin C has been found to be safe and of low cost, making its use feasible in the prevention and treatment of the common cold.
University of Helsinki. Vitamin C is beneficial against the common cold, review suggests. ScienceDaily.