Your Body Has Two Ages. A Free PhenoAge Calculator Shows the Gap
Your body has two ages. Your birth certificate says one number. Your blood says another. The gap between them is, increasingly, the thing longevity researchers actually care about. Chronological age is a clock that only moves in one direction. Biological age — estimated from the pattern of inflammation, metabolism, and organ function in your blood — moves in both. That is the whole point. > Educational tool only. Not a medical device. Not diagnostic. The calculator described here is for self-tracking and education. Any blood result outside a reference range should be discussed with a licensed clinician. Where the number comes from: Levine's PhenoAge Most of the "biological age" numbers floating around social media trace back to one paper: Morgan Levine et al., An epigenetic biomarker of aging for lifespan and healthspan (Aging US, 2018, PMID 29676998 ). Levine's team trained a mortality model on NHANES data using 42 clinical markers, then reduced it to a ...