Vitamin C Offers Little Protection Against Colds

Unless you run marathons, you probably won't get much protection from common colds by taking a daily supplemental dose of vitamin C.

Conducted over several decades and including more than 11,000 people who took daily doses of at least 200 milligrams, the review also shows that vitamin C (ascorbic acid) does little to reduce the length or severity of a cold, according to the researchers at the Australian National University and the University of Helsinki.

However, they found that people exposed to periods of high stress