WebMD reports:

Feb. 23, 2009 — A walk in the sun may be better than popping a vitamin C tablet for boosting your chances of preventing the common cold or flu.

A new study adds to mounting evidence that vitamin C may have been stealing the spotlight all these years from the real cold fighter, vitamin D.

The study, the largest to date on the link between vitamin D and common respiratory infections, shows that people with the lowest vitamin D levels report having significantly more cases of cold and flu than those with higher levels. Vitamin D is produced by the body in response to sunlight and is also found in fortified foods such as milk. […]

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