Biological age testing

Measuring how old your body actually is, biologically speaking, which can differ from your calendar age by a decade in either direction. Three families of tests dominate: epigenetic clocks like Horvath and Hannum that read DNA methylation (the scientific gold standard since 2013), telomere length tests (Life Length, TeloYears), and composite biomarker panels (GlycanAge, InsideTracker). A premium longevity stay almost always includes a TruDiagnostic or TruAge epigenetic test, costing USD 299 to 599, plus personalised recommendations on diet, sleep, exercise and supplements. The marketed promise is to close the gap between biological and chronological age by 2 to 5 years within 12 to 18 months.