Biohacker Bryan Johnson diagnosed with autoimmune gastritis

Bryan Johnson, a prominent tech entrepreneur and biohacker who has spent millions of dollars in a highly public quest to reverse aging, has revealed he is battling an incurable autoimmune disease. Johnson, 48, announced in late June that he was diagnosed with autoimmune gastritis (AIG), a chronic condition where the immune system attacks the stomach lining, which he described by saying, "My stomach is eating itself."

The diagnosis, confirmed in May 2026, followed years of unexplained low iron levels that persisted despite Johnson's extreme health optimization regimen, known as the Blueprint protocol. This regimen includes a strict vegan diet, exhaustive biomarker testing, and experimental therapies aimed at achieving what he calls "longevity escape velocity," with the goal of living to 2140. Johnson stated the autoimmune condition likely developed alongside a thyroid disorder he has managed since age 21, with contributing factors stemming from childhood diet, stress, and weight gain in his early adulthood.

Medical investigations, including a colonoscopy, an upper endoscopy, and specialized blood tests, initially returned normal results. The breakthrough came from stomach...