Feb 24, 2026Longevity Biomarkers: What to Track, How Often, and What the Evidence Says They MeanNo single biomarker captures biological age, but a panel of accessible blood and functional markers — HbA1c, hs-CRP, homocysteine, IGF-1, DHEA-S, grip strength, and VO2 max — provides a practical composite picture. Epigenetic clocks offer precision but limited actionability at current cost.