wie testet man glutenunverträglichkeit — can a DNA test help?

Whether a DNA test can help diagnose gluten intolerance depends on the type. For celiac disease, an autoimmune condition, the HLA-DQ2 and HLA-DQ8 genes are strongly associated. A DNA test can detect these variants, providing a high negative predictive value (if absent, celiac disease is very unlikely). However, a positive result is not diagnostic, as about 30 % of the general population carry these genes without developing the disease. For non-celiac gluten sensitivity (NCGS), no reliable genetic markers exist; diagnosis relies on symptom tracking and exclusion diets. The provided context does not address gluten intolerance or related genetic markers, so the evidence for DNA testing in this area is unclear. Consumers should be cautious: commercial DNA tests may claim to assess food sensitivities, but their clinical utility for gluten-related disorders is limited. A medical evaluation, including serology and possibly endoscopy, remains the gold standard for celiac disease. DNA tests can be a complementary tool but never a standalone diagnosis.