Longevity entrepreneur Bryan Johnson says he has been diagnosed with autoimmune gastritis, an autoimmune disorder that damages the stomach's parietal cells and can interfere with the body's ability to absorb vitamin B12 and iron.
Longevity entrepreneur Bryan Johnson says he has been diagnosed with autoimmune gastritis, an autoimmune disorder that damages the stomach's parietal cells and can interfere with the body's ability to absorb vitamin B12 and iron.
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