Billionaire Bryan Johnson reveals autoimmune gastritis is 'eating' his stomach
Billionaire anti-aging influencer Bryan Johnson disclosed that he has autoimmune gastritis (AIG), a hidden autoimmune condition where the stomach lining is attacked, linked to a long history of iron deficiency and thyroid disease. Diagnosed via a bi-directional endoscopy with elevated anti-parietal cell antibodies, he outlines a proactive management plan including routine ferritin/iron/B12 monitoring and a 1,000 mg monoclonal iron infusion, plus a phased strategy from supportive care to experimental therapies, all while noting there’s no cure today and urging ongoing health surveillance.