Bryan Johnson says autoimmune gastritis went undetected for years despite his extreme anti-aging routine, as doctors explain how the silent stomach disease can cause iron and B12 deficiencies

Bryan Johnson, renowned biohacker, disclosed his diagnosis of autoimmune gastritis after undergoing extensive medical tests, including biopsies and blood work.

ALBAWABA - Famous 'Anti-ageing biohacker' and influencer Bryan Johnson recently made headlines after revealing that he has an autoimmune disease called