By Ian Sample
TheGuardian 06/07/2015
Tests on physiological markers in nearly 1,000 38-year-olds found that some had biological ages many years older than their birthdates would suggest.
If the school reunion was not proof enough, scientists have confirmed that people grow old at radically different rates, with some ageing much faster than their fresh-faced former classmates.
A study of nearly one thousand 38-year-olds found that while most had biological ages close to the number of birthdays they had notched up, others were far younger or older.
Researchers used 18 physiological markers, including blood pressure, organ function, and metabolism, to assess the biological age of each of the participants. For some, the past dozen years had taken no obvious toll on their body’s biology.
But others were not so fortunate. A good many participants had biological ages in the 50s, while one, described by scientists as an “extreme case”, had a biological age of 61 years old. That meant that for every birthday over the past dozen years, their body had aged three years.