Aging in humans (and animals) can be seen as either an inevitable process of wear and tear or as an inherent biological program by which the lifespan of each species is more or less predetermined. Recent research has shown that DNA methylation, an epigenetic modification which alters how DNA is read and expressed without altering the underlying sequence, can show age-related changes. A sub-set of these modifications are so accurate that chronological age in humans can be predicted +/- 3.6 years ...
Aging in humans (and animals) can be seen as either an inevitable process of wear and tear or as an inherent biological program by which the lifespan of each species is more or less predetermined. Recent research has shown that DNA methylation, an epigenetic modification which alters how DNA is read and expressed without altering the underlying sequence, can show age-related changes. A sub-set of these modifications are so accurate that chronological age in humans can be predicted +/- 3.6 years ...
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