Just a few years ago, it seemed as if vitamin E could be the cure for nearly everything. Observational studies suggested that moderately high doses (400 International Units, or IUs) could prevent heart disease, cancer and dementia--and make your skin glow too. But lately scientists, using more rigorous tests, have had trouble substantiating some of those benefits.
Now comes what may be the crowning blow--at least with respect to staving off heart disease. A double-blind placebo-controlled trial, published in the Journal of the American Medical Association last week, found that taking 400 IUs of vitamin E each day did nothing to...
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