@dr.matthewnagra: Apparently Bryan Johnson’s diagnosis of autoimmune gastritis (AIG) is now being blamed on his plant-based diet… without a shred of evidence. Vince Pitstick claims that vegan and vegetarian diets are risk factors for developing autoimmune diseases (including AIG), yet provides zero references. The American Gastroenterological Association’s Expert Review identifies factors like other autoimmune diseases, older age, female sex, and genetics as being associated with autoimmune gastritis. Diet isn’t explicitly identified as a risk factor in their review, and the available research on diet and autoimmune gastritis is extremely limited from my own search through the literature. Ironically, we do have randomized controlled trials showing that vegan and vegetarian diets can improve symptoms of rheumatoid arthritis, which is itself an autoimmune disease. References: https://pmc.ncbi.nlm.nih.gov/articles/PMC8740554/ https://ijdrp.org/index.php/ijdrp/article/view/615 https://pubmed.ncbi.nlm.nih.gov/40907874/ #bryanjohnson #longevity #autoimmune #nutrition #vegan

Dr. Matthew Nagra, ND

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Wednesday 15 July 2026 17:19:30 GMT