Bryan Johnson Diagnosed with Autoimmune Gastritis

Bryan Johnson, the 48-year-old American tech entrepreneur and longevity advocate, announced on June 30 via X that he has been diagnosed with autoimmune gastritis (AIG). AIG is a disorder in which the immune system attacks the stomach lining.

Background and Diagnosis

Johnson stated that the AIG went undetected for several years until May 2024. He noted that his hypothyroidism, diagnosed at age 21, was managed with medication. Johnson attributed the AIG to his previous diet of fast food and sugary beverages, consumed before he began his current health protocol.

Medical Details and Risks

Johnson stated that AIG can cause nutritional deficiencies, anemia, and an increased risk of cancer. According to Johnson, standard medical care considers the condition manageable but not curable.

"Standard medical care considers the condition manageable but not curable."

Planned Response

Johnson said his team plans to pursue experimental treatments. These include routine monitoring of biomarkers and advanced characterization of the disease. He also intends to monitor diagnostic tests and develop treatments.

Personal and Professional Context

Johnson sold his company, Braintree Venmo, to PayPal in 2013. He reportedly spends approximately $2 million per year on his health regimen, which includes a 1,977-calorie vegan diet, supplements, and medical procedures.