Vitamin D Supplements Don't Fend Off Colds, University of Otago Study
10/3/2012 7:16:29 AM
Although some data have suggested a possible inverse association between serum vitamin D levels and the incidence of upper respiratory tract infections (colds), participants in a randomized controlled trial who received a monthly dose of 100,000 IUs of vitamin D3 did not have a significantly reduced incidence or severity of colds, according to a study in the October 3 issue of JAMA. The association of vitamin D insufficiency and susceptibility to viral respiratory tract infections has been unclear, according to background information in the article.
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