Biological age tests' accuracy is questionable for individuals

New tests claiming to measure "biological age" promise to reveal cellular wear and tear, but their individual accuracy is questionable. These tests use blood or saliva samples to assess how well the body is aging at a molecular level. While research shows these tests can predict disease risk and correlate with lifestyle factors, individual results can vary significantly, with potential deviations of up to nine years. This lack of standardization and precision limits their usefulness. Experts advise focusing on established healthy habits like diet, exercise, and stress reduction, rather than relying on expensive, potentially unreliable biological age tests.