According to Tim Spector at King's College London, until now the only recognised biological indicator of age has been the length of telomeres – tips of chromosomes that wear down each time a cell divides, and so which shorten with age.
Now Spector and his team have identified a panel of 22 metabolites – small molecules such as fats and amino acids – that vary over time and can be used to reveal age to within 10 years.
Read more:
Blood test to estimate your age and predict health
Source: New Scientist
Art and Science of Laboratory Medicine
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