Biological age clocks help measure how your body is aging relative to your chronological age. In this video, Mike Lustgarten examines the Bortz biological age clock — a blood-based tool for estimating biological age — and compares it to PhenoAge, one of the most widely used aging clocks. Lustgarten, who tracks his own biomarkers obsessively, evaluates whether the Bortz clock offers better accuracy or actionability for people trying to slow aging. He provides links to test the Bortz biomarkers through lab services and a calculator to compute your Bortz biological age score. This matters because choosing the right aging clock can shape how effectively you monitor and respond to lifestyle interventions aimed at extending healthspan.
