Biohacker hoping to live to 160 reveals alarming diagnosis: 'My stomach is eating itself'

Bryan Johnson, a longevity entrepreneur, disclosed he has been diagnosed with autoimmune gastritis, a condition in which the immune system attacks the stomach's parietal cells and can impair absorption of vitamin B12 and iron. Johnson has pursued experimental health interventions and documented his efforts to extend his lifespan. Autoimmune gastritis can lead to complications including pernicious anemia if untreated, according to medical literature.

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