Questions people ask about Gluten Genetik

The genetics of gluten intolerance is complex. For celiac disease, the HLA-DQ2 and HLA-DQ8 gene variants are strong risk markers: over 95 % of patients carry one of these alleles. However, many people with these variants never develop celiac disease – penetrance is low. A positive genetic test alone is not diagnostic; it requires antibody tests and a duodenal biopsy. For non-celiac gluten sensitivity (NCGS), no established genetic markers exist; diagnosis is by exclusion. Consumer DNA tests for 'gluten genetics' typically screen for these HLA markers or single SNPs (e.g., in IL15, CTLA4) whose clinical relevance for NCGS is unclear. The evidence is therefore 'gwas' or 'mechanistic', not clinically validated. Important: Anyone experiencing symptoms after gluten should seek medical evaluation for celiac disease before going gluten-free, otherwise diagnostic tests become invalid. A DNA test can provide a hint but never replaces a clinical diagnosis.