Vitamin D vs. Common Cold: And the Winner Is...

November 11, 2014 6:20 PM

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Now that winter is basically knocking at our door, many of us will have to face the most common and dreaded disease in America: the common cold. Upper respiratory tract infections (URTI) represent the most common reason for U.S. emergency visits and is the most widespread disease in the States (1). Since so many of us fall victim to this almost, if not definitely, yearly, most Americans want to improve their immune system so as to be less likely to contract one. And if you walk through a pharmacy you'll notice plenty of supplements touting the "immune-boosting" powers of Vitamin C, echinacea, and all sorts of other herbs and vitamins. The scientific and medical community, however, are still debating the efficacy of such supplements. Despite that, one vitamin has come to the spotlight with some very convincing evidence: vitamin D.

In 2011, a large scale study was conducted in Britain to investigate the relationship between current vitamin D status (measured by 25-hydroxyvitamin D, 25(OH)D) and respiratory infections (2). It followed 6,789 Caucasian men and women all born in Britain in one week of March, 1958. The results were...

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