NEW ORLEANS — Vitamins C and E — pills taken by millions of Americans — do nothing to prevent heart disease in men, one of the largest and longest studies of these supplements has found.
Vitamin E even appeared to raise the risk of bleeding strokes.
Besides questioning whether vitamins help, “we have to worry about potential harm,” said Barbara Howard, a nutrition scientist at MedStar Research Institute of Hyattsville, Md.
She reviewed and discussed the research Sunday at an American Heart Association conference. Results also were published online by the Journal of the American Medical Association.
About 12 percent of Americans take supplements of C and E despite growing evidence that these antioxidants do not prevent heart disease and may even be harmful.
Male smokers taking vitamin E had a higher rate of bleeding strokes in a previous study, and several others found no benefit for heart health.
As for vitamin C, some research suggests it may aid cancer, not fight it. A previous study in women at high risk of heart problems found it did not prevent heart attacks.
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