Medical SuppliesResearch published online Monday in the Journal of the American Medical Association finds that taking a daily multivitamin offers no more protection against heart attack, stroke or death from cardiovascular disease than taking a daily placebo pill.  The study was based on the Physicians' Health Study II (PHS II), a randomized, double-blind, placebo-controlled trial that began in 1997 and ran through June 1, 2011. It included 14,641 male physicians (754 with a history of cardiovascular disease) who were 50 years or older at the start of the study. About half (7,317) of the men were randomly assigned to take a daily Centrum multivitamin; the other half (7,324) were assigned to take placebo pills.

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