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The anti-aging industry is feeding turn-back-time fever by selling megadoses of vitamins and supplements meant to prevent the body's organs from deteriorating. Critics charge there is no scientific evidence that these costly -- and largely unmonitored -- regimens actually work. But business is brisk. BusinessWeek's executive managing editor, John Byrne, talks with science editor Arlene Weintraub about her BW cover story on the anti-aging boom
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