wie lange gluten essen vor zöliakie-test — what are common causes?

The question about how long to eat gluten before a celiac test is medically well-established: For reliable diagnosis (serology and duodenal biopsy), a gluten-containing diet for at least 6–8 weeks, ideally 12 weeks, is recommended. Daily intake should be at least 10 g of gluten (about 2–3 slices of bread). Insufficient or short gluten consumption can lead to false-negative results. Common causes of celiac disease include genetic predisposition (HLA-DQ2/DQ8), autoimmune response to gluten, and environmental triggers such as early gluten exposure or infections. The provided contexts contain no specific information on celiac disease or gluten challenge; therefore, this answer is based on general medical knowledge and guidelines. Evidence is rated as 'practice' because it reflects established clinical practice.