wie testet man glutenunverträglichkeit — which blood markers matter?

Testing for gluten intolerance (celiac disease) relies on specific blood markers. The primary test is IgA antibody against tissue transglutaminase (tTG-IgA). Additional markers include total IgA (to rule out IgA deficiency), deamidated gliadin peptides (DGP-IgA/IgG), and endomysial antibodies (EMA). Positive serology is followed by duodenal biopsy for confirmation. Genetic testing for HLA-DQ2/DQ8 can effectively rule out celiac disease but does not confirm it. Crucially, a gluten-free diet must not be started before testing, as it can normalize antibody levels. The provided context lacks specific information on these markers, so this answer is based on standard clinical practice. Evidence is strong but not derived from the given context. Home test kits are not reliable for diagnosis; medical supervision is essential.