Even a $2 Million Longevity Regimen Couldn't Prevent Bryan Johnson's Autoimmune Gastritis

Bryan Johnson, founder of The Blueprint and Immortals longevity program, reveals he has autoimmune gastritis after more than a decade and roughly $2 million a year in health‑tracking and a 30‑person medical team. The condition destroys stomach parietal cells responsible for acid and intrinsic factor, impairing iron and B12 absorption and risking anemia and nerve damage, with no approved cure yet. Johnson is pursuing experimental immune therapies while noting that wearables and routine bloodwork can miss slow diseases, highlighting the limits of self‑tracking in predicting health outcomes.