What Is Phenotypic Age?
An introduction to the blood-based model and what its result can—and cannot—mean.
AI-assisted editorial draft · Source check: 6 September 2026 · Independent reviewer: not yet assigned
A composite of routine measurements
Phenotypic Age combines chronological age and nine blood biomarkers. Its development used mortality-related information to create an interpretable age-scale composite.
Source 1: Aging / Levine et al.It is not DNAm PhenoAge
The blood-based calculation and the DNA-methylation model share related terminology but require different inputs. Read the full method name on the product page and sample report.
Source 1: Aging / Levine et al.Before using a calculator
Check the units, the complete marker list, how missing values are handled and whether processing happens locally or on a server. A mathematically correct result can still be misinterpreted. The original studies describe population associations, not an individual diagnosis.
Source 1: PLOS Medicine / Liu et al.Sources & verification
- An epigenetic biomarker of aging for lifespan and healthspan (2018)
Aging / Levine et al. · Accessed 2026-09-06
- A new aging measure captures morbidity and mortality risk (2018)
PLOS Medicine / Liu et al. · Accessed 2026-09-06