Iron plays a very important part in the reactions in our cells that produce damaging free radicals, which glom onto cell membranes and DNA, and may translate into aging the cell.

而铁元素在我们的细胞中产生一种具有破坏性的，能渗透进细胞膜和DNA并老化细胞的物质的过程中扮演着重要的角色。

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Free radicals, linked to rapid aging, are highly reactive with other molecules, including vital DNA and proteins, the destruction of which can damage or kill cells.

与迅速衰老相关联的自由基很容易与包括维持生命所必需的DNA和蛋白质发生反应，而破坏这些DNA和蛋白质，就可能会损伤或杀死细胞。

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The field of biological aging has in recent years focused on the long molecules of DNA contained in human cells called chromosomes.

在研究生物学老化问题的领域，近年来科学家们把注意力集中在被称作染色体的细胞DNA长分子上。

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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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