Rice is naturally gluten-free, as it is a grain that does not contain gluten. However, processed rice products or cross-contamination during manufacturing can introduce gluten traces. A microbiome test analyzes the composition of gut bacteria and may provide clues about intolerances or inflammatory processes, but it cannot directly determine whether a food contains gluten. For suspected celiac disease or gluten sensitivity, specific antibody tests (e.g., tTG-IgA) and duodenal biopsy remain the gold standard. A microbiome test can offer complementary insights into gut health but does not replace gluten-specific diagnostics. The evidence for using microbiome tests to answer whether rice is gluten-free is therefore weak. For a reliably gluten-free diet, choose certified gluten-free rice products and consult a physician if symptoms persist.
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