Bryan Johnson reveals he has autoimmune gastritis and is receiving vitamin B12 injections, high-dose intravenous iron and close biomarker monitoring while clinicians plan follow-up biopsies and possible experimental therapies.Detailed diagnostics show elevated anti-parietal cell antibodies after more than a decade of unexplained low ferritin despite normal routine tests, a pattern that impairs iron and vitamin B12 absorption and raises the risk of stomach tumors even without active bleeding or cancer.Johnson says he spends about $2M a year on
Project Blueprint, has used plasma transfusions from his father and his eldest son, appears in the
Netflix documentary “Don't Die,” and intends to pursue experimental and artificial intelligence–assisted research to try to treat the disease.