The Anti-Longevity PlaybookGet the Playbook
Evidence Review
Biological Age Tests
Verdict
UnprovenEvidence Tier
C
Weak evidence
Human Studies
Yes — correlation only
Typical Cost
$200-500/test
Epigenetic clocks and biological age tests correlate with mortality risk at a population level. However, no study has shown that interventions guided by these tests improve individual outcomes. The tests have significant measurement variability between platforms and between draws. You can get a different biological age from the same blood sample sent to two different labs.
The full evidence review — including why your biological age result might change depending on which lab you use — and what that means — is in Section 8 (Advanced Testing) of The Anti-Longevity Playbook.
Reviewed by Dr. Ramy Khalil, MD · Double Board-Certified Internal Medicine · Last updated March 2026
Are biological age tests accurate?
Epigenetic clocks correlate with mortality at population level, but results vary significantly between platforms. No study shows test-guided interventions improve individual outcomes.
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