ist reis immer glutenfrei — can a microbiome test help?

Is rice always gluten-free? In its natural, unprocessed form, rice does not contain gluten. Gluten is a protein found in wheat, rye, barley, and their derivatives. Rice (Oryza sativa) is a gluten-free grain. However, cross-contamination can occur during cultivation, harvesting, transport, or processing, especially in shared facilities. Processed rice products (e.g., rice crackers, rice bread, ready meals) may contain traces of gluten. For individuals with celiac disease or non-celiac gluten sensitivity, only rice explicitly labeled 'gluten-free' is considered safe. Can a microbiome test help? Current evidence is limited. While microbiome analysis can reveal general dysbiosis, no validated stool biomarker exists to diagnose gluten intolerance. Some research suggests certain bacteria (e.g., Lactobacillus spp.) may degrade gluten peptides, but this is not clinically actionable. Microbiome tests marketed for gluten sensitivity often lack robust validation and should not replace standard medical workup (serology, endoscopy). The evidence for their utility is weak and largely marketing-driven.