Tech founder and biohacker Bryan Johnson has revealed he is battling autoimmune gastritis, a rare and incurable condition where the immune system attacks the stomach lining.
The 48-year-old millionaire announced the diagnosis on social media in July 2026, stating the illness was discovered in May 2026 after a series of advanced medical examinations.
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According to reports from news. com.
au and The Times of India, Johnson had been dealing with long-term, unexplained iron deficiency that traditional treatments failed to resolve.
His medical team uncovered the condition using a bi-directional endoscopy, blood biomarkers, and stomach biopsies.
The tests showed elevated anti-parietal cell antibodies and early weakening of his stomach lining.
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Johnson explained that autoimmune gastritis often goes undetected, affecting an estimated 2 to 5 percent of people.
The condition can lead to nutritional deficiencies, anemia, and an elevated risk of cancer over a long horizon.
The tech mogul noted that his iron deficiency, autoimmune thyroid disease, and autoimmune gastritis are all interconnected, making each condition exceptionally difficult to fix because an underactive thyroid and low iron levels negatively impact one another.
Despite standard medical care stating that nothing can be done for the condition except managing symptoms, Johnson stated that his team will routinely monitor diagnostics and develop experimental intervention treatments.
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The health announcement came shortly after Johnson returned from a trip to Australia, where he claimed intense sun exposure increased his visible skin aging by 5 percent in just one week despite using a protective ultraviolet umbrella.
