For about $150 (or more) you can have your DNA analyzed, and get a range of comment about what diseases and conditions you might be more susceptible to, compared with the average person. But what can you usefully do with the information, and is it worth bothering? The Tests The most widely publicized tests are …

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Telomeres are bits of DNA at the ends of each chromosome, and protect the chromosome during cell division. Over time, the bits of DNA get shorter, and it’s exacerbated by things like sun exposure. When the telomere is too short, it blocks cell division, and leads to aging of your cells, and thus to various …

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