In recent years, both research on and the availability of vitamin supplements has increased, drawing increased attention to the possibility that a daily pill can enhance health.
In particular, it is a message that is resounding with men. According to the Council for Responsible Nutrition, 53 percent of American adults take a multivitamin supplements, and 50 percent of adult men 18 and older take a multivitamin, according to a 2008 survey.
But preliminary encouraging findings can often hit a...
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