Biohacker Bryan Johnson reveals autoimmune gastritis diagnosis: 'My stomach is eating itself'; condition affects 0.5 to 2 percent of U.S. population

Biohacker Bryan Johnson, a former tech CEO known for his extreme health regimen, disclosed his diagnosis of autoimmune gastritis (AIG) in May. He described the condition as his stomach "eating itself," which leads to nutritional deficiencies and an increased risk of cancer.¹

AIG affects an estimated 0.5 to 2 percent of the U.S. population and occurs when the immune system attacks the stomach lining. Johnson noted, "Had I not taken care of my body during the past five years, the situation would be much worse so I am very grateful to have been focused on health."⁴⁵⁶

He shared that he had low iron for 11 years, stating, "With AIG, my stomach doesn’t make enough acid to absorb iron." The condition causes irreversible damage, leading to anemia and other serious health issues. Johnson criticized the current medical approach, which he claims concedes defeat, stating, "When AIG is discovered today, standard medical care concedes defeat, stating that nothing can be done except managing the condition, no matter how awful or lethal the effects."³⁸¹⁰

Despite the grim prognosis, Johnson remains optimistic, asserting that in the age of AI and advanced medical technologies, no condition should be deemed incurable simply because it hasn't been addressed with modern methods.