Bryan Johnson’s chronic disease is notoriously difficult to diagnose - Takeaways - MDSpire

Bryan Johnson’s chronic disease is notoriously difficult to diagnose

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  • Sarah Todd

  • July 8, 2026

  • 0 min

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  • 1

    Bryan Johnson announced he has autoimmune gastritis, a chronic condition where antibodies destroy stomach acid-producing cells.

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    Autoimmune gastritis affects about 4% of the global population and is often misdiagnosed due to its insidious nature.

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    Diagnosis typically requires an upper endoscopy with biopsies, especially for patients with low ferritin levels.

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    Current treatments focus on managing symptoms and monitoring for stomach cancer, as effective cures are lacking.

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    Johnson's team is exploring experimental therapies like CAR-T therapy, which has not been extensively studied for autoimmune gastritis.

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