How Old Are You Really? Genes Reveal 'Biological Age'

By reading a "signature" based on 150 of a person's genes, researchers can determine the individual's biological age, which may be different from his or her chronological age, according to a new study. Moreover, a person's biological age is a better measure for determining a person's health than is chronological age, these researchers say. In the study, people's biological age was more closely tied to their risk of TK and TK than was their chronological age.