Myths vs facts: HLA-DQ2 and Darmgesundheit

HLA-DQ2 is a genetic marker strongly associated with celiac disease, an autoimmune condition triggered by gluten. However, a positive result does not mean you have celiac disease or gluten intolerance. About 30 % of the population carry HLA-DQ2, yet only a minority develop celiac. Myth: HLA-DQ2 directly indicates poor gut health. Fact: It only increases risk; gut health depends on microbiome, diet, inflammation, and many other factors. A DNA test alone cannot diagnose gut health. Evidence for non-celiac gluten sensitivity is unclear. For celiac suspicion, antibody tests and duodenal biopsy are required. For general gut health, microbiome tests offer moderate evidence but lack standardized cutoffs. Bottom line: HLA-DQ2 is a risk marker, not a diagnostic tool for gut health.