Updated: August 26, 2011

Now a new study showsthat it may help you live longer, too. Researchers at Dartmouth Medical School found thatpeople who had blood drawn twice a year had a lower risk of heart disease than thosewho didn't. "It removes excess iron that builds up in the body, which can damage artery wallsover time," says lead author Leo R. Zacharski, M.D. Find a local blood drive at givelife.org.

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