Myths vs facts: Zöliakie Test and Haut

Myths vs facts: Celiac test and skin. A common myth is that a genetic test (e.g., HLA-DQ2/DQ8) alone can diagnose celiac disease. Fact: It only indicates genetic susceptibility – about 30 % of the population carry risk alleles, yet only a fraction develop celiac. A negative test, however, almost rules it out. Another myth: skin symptoms like itching or blisters are always 'normal' allergies. Fact: Dermatitis herpetiformis (Duhring's disease) is the classic skin manifestation of celiac, confirmed by skin biopsy showing IgA deposits. Some companies promote microbiome tests for celiac diagnosis – there is no scientific evidence for this. Diagnosis relies on serology (tTG-IgA) and duodenal biopsy. A DNA test from MyBody-X can identify risk factors but does not replace medical evaluation. Caution: For unexplained skin rashes, a dermatologist should consider biopsy before starting a gluten-free diet.