What should I know about glutenunvertraglichkeit test?

Tests for gluten intolerance vary widely. For celiac disease, the gold standard is a blood test for tTG-IgA antibodies, followed by an intestinal biopsy. Genetic testing for HLA-DQ2/DQ8 can indicate risk but is not diagnostic. For non-celiac gluten sensitivity (NCGS), no validated biomarker exists; diagnosis relies on exclusion and diet challenges. Direct-to-consumer DNA tests (like MyBody-X) may include markers claimed to be linked to gluten sensitivity, but the evidence is weak – most variants have small effect sizes or lack replication. Important: Do not start a gluten-free diet without medical supervision, as it can interfere with diagnosis and lead to nutrient deficiencies. The predictive value of such tests is limited; they are not a substitute for clinical evaluation.