Claim · 2021 · Blueprint (Project Blueprint)
At the launch of Project Blueprint (October 2021), Johnson claimed a measured biological age of 36 against a chronological age of 44, and framed the goal as reversing the biological age of over 70 organs toward 'aging escape velocity.'
The founding claim of the case. Johnson’s own 2021 announcement is explicit that the measurement is a single uncontrolled self-experiment (‘even if an N=1 for now’), and the peer-reviewed literature on the underlying clock technology (Apsley et al. 2025) concludes such individual-level biological-age readings are not validated for clinical or predictive use. No independent laboratory has replicated the specific 36-versus-44 figure.
Appears in
Sources
- Project Blueprint — Johnson, Bryan. 'Project Blueprint.' bryanjohnson.com, 13 October 2021.
- From population science to the clinic? Limits of epigenetic clocks as personal biomarkers — Apsley AT, Etzel L, Ye Q, Shalev I. 'From population science to the clinic? Limits of epigenetic clocks as personal biomarkers.' Epigenomics 2025;17(18):1447-1461. DOI: 10.1080/17501911.2025.2603880. PMID: 41403206.