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Bryan Johnson Says He May Have Taken His Longevity Experiment Too Far

Johnson’s public doubt follows a newly disclosed autoimmune gastritis diagnosis and his team’s plan to monitor biomarkers and pursue experimental immune therapies as there is no approved cure.

Overview

  • Johnson wrote on X that he is rethinking his long-running anti‑ageing program, a post published Thursday that asked whether he had “taken this whole longevity thing too far.”
  • He disclosed earlier this month that he was diagnosed with autoimmune gastritis, a condition in which the immune system attacks the stomach lining that can cause iron and B12 deficiencies and raise long‑term cancer risk.
  • Johnson and his medical team say they will track his iron and other biomarkers closely and consider experimental immune‑targeted approaches such as targeting immune proteins, rebuilding regulatory T cells, or engineered cell therapies, though no approved cure exists for AIG.
  • High‑profile, sensational claims Johnson has made recently — including that he ‘cloned’ himself as a newborn — remain unverified in reporting and have fuelled intense public scrutiny of his methods.
  • Doctors and commentators say Johnson’s case highlights the limits of exhaustive self‑monitoring and extreme interventions, raising medical, ethical and regulatory questions about unproven longevity experiments and their effects on patients and families.