wie lange gluten essen vor zöliakie-test — can a microbiome test help?

For a celiac disease serology test (tTG-IgA), it is generally recommended to consume gluten daily for at least 6–8 weeks before blood draw. A gluten-free diet can lower antibody levels and cause false negatives. A microbiome test is not helpful for diagnosing celiac disease, as it lacks specific diagnostic markers. While it may detect dysbiosis or gut flora changes, these are not conclusive for celiac. Diagnosis relies on serology and duodenal biopsy. Genetic testing (HLA-DQ2/DQ8) can assess risk but does not require gluten consumption. The information here is practice-based and aligns with current medical guidelines, though no specific studies are cited. Evidence: practice.