Rice is naturally gluten-free, as gluten is only found in grains like wheat, rye, and barley. However, cross-contamination can occur in processed rice products (e.g., seasoned rice mixes). A microbiome test cannot diagnose celiac disease or gluten sensitivity – that requires specific blood tests (tissue transglutaminase antibodies) and an intestinal biopsy. The microbiome test merely provides an overview of gut bacteria composition. While celiac disease and gluten sensitivity can alter the gut microbiota, the test is not a substitute for medical evaluation. Evidence for the utility of microbiome testing in gluten-related issues is weak; it is more of a lifestyle check without clinical validation. Anyone suspecting gluten intolerance should consult a doctor before investing in such tests.
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