ist reis glutenfrei? — can a microbiome test help?

Yes, rice is naturally gluten-free. Gluten is found in wheat, barley, and rye, not in rice. However, cross-contamination can occur in processed rice products (e.g., ready meals, seasoned rice mixes). A microbiome test cannot diagnose celiac disease or non-celiac gluten sensitivity. Gut microbiome analysis provides no clinically validated information about gluten intolerance. The evidence for such tests is mostly marketing-driven and not supported by robust studies. If you suspect gluten intolerance, consult a doctor for proper celiac testing (blood test, duodenal biopsy). A microbiome test is not appropriate for this purpose.