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Men's Health

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Too Much Iron in Your Blood?

Then donate a pint. It may protect you against heart disease.

WebMD Feature

May 1, 2000 (Atlanta) -- At a time when blood banks report dangerously low supplies, the best argument for rolling up your sleeve is still to do someone else some good. But if University of Florida researcher Jerome Sullivan, MD, is right -- and there's new evidence to suggest he is -- giving blood could also save your life.

Here's why. Each time you give blood, you remove some of the iron it contains. High blood iron levels, Sullivan believes, can increase the risk of heart disease. Iron has been shown to speed the oxidation of cholesterol, a process thought to increase the damage to arteries that ultimately leads to cardiovascular disease.

Recommended Related to Men

Going Long: Secrets of Male Longevity

Give it up, Ponce de León — there are no magical fountains of youth out there, no miraculous ways to achieve a longer life. But while medical experts caution against hormone supplements, vitamin overdoses, anti-aging pills, extreme diets, and other dubious life extension tricks, there are some sound ways for men to increase their chances for a long and healthy life. Much of the advice is obvious: Don’t smoke, eat wisely, drink moderately, exercise regularly, and get annual medical check-ups. But...

Read the Going Long: Secrets of Male Longevity article > >

Sullivan has long suspected that blood iron levels help explain why a man's risk of heart disease begins earlier than a woman's. Women lose blood -- and lower their iron levels -- each time they menstruate. Men, on the other hand, begin storing iron in body tissues starting in their twenties, which is just about the time their heart attack danger begins to climb. According to Victor Herbert, MD, a hematologist at the Mt. Sinai School of Medicine in New York City, there are normally about 1,000 milligrams of iron "stored" in the average adult man's body but only about 300 milligrams in a premenopausal woman's. Once women stop menstruating, however, their iron levels -- and their heart disease risk -- begin to climb, eventually matching that of men.

Not everyone's convinced by Sullivan's notion. "I do not believe there is proof of an association between iron level and the risk of heart disease in men with normal iron metabolism," says Peter Tomasulo, MD, a director at the International Federation of Red Cross Societies. "The data is preliminary at best." Most scientists, in fact, still think estrogen is probably the most important reason why women are protected from heart disease until they reach menopause.

But several recent findings lend support to the possibility that iron levels play a role. In research reported last year in the journal Circulation, Swedish scientists found that men with a genetic abnormality that causes slightly elevated blood iron levels had a 2.3-fold increase in heart attack risk. A second study published in the same journal found that women with the abnormal gene were also at greater risk of cardiovascular disease. Together, Sullivan believes, those studies offer new support for his iron hypothesis.

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