ist reis glutenfrei — which blood markers matter?

Rice is naturally gluten-free, as it does not contain wheat, rye, or barley proteins. However, processed rice products (e.g., ready meals, rice cakes) may be cross-contaminated with gluten. For diagnosing celiac disease or gluten sensitivity, specific blood markers are relevant: Tissue transglutaminase IgA (tTG-IgA) is the recommended first-line test for celiac disease, complemented by total IgA to avoid false negatives in IgA deficiency. EMA-IgA (endomysial antibodies) and deamidated gliadin peptides (DGP) can be used in ambiguous cases. IgG-based food intolerance tests (e.g., IgG against rice) are not scientifically validated – they merely reflect immune exposure, not intolerance. Positive celiac serology should always be confirmed by duodenal biopsy. For confirmed celiac disease, lifelong strict gluten-free diet is mandatory; for non-celiac gluten sensitivity, an individual elimination trial may help. Note: A high TSH (from context) is not a marker for gluten issues but for thyroid function.