It markets a supplement called TA-65, which the company says lengthens telomeres, the caps on the ends of DNA associated with aging.

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The plan is to block telomerase, an enzyme that prevents the ends of DNA and seems to prevent cells from aging.

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In its European markets, for example, cosmetic company Juneva of Switzerland sells a product called DNA Skin Optimizer Fluid, which promises to help aging skin cells to renew and duplicate themselves by targeting the nuclei--Juneva says skin takes on a fresher, smoother appearance within days of use.

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