ist in reis gluten? — what are common causes?

No, rice is naturally gluten-free. Gluten is a protein found in wheat, rye, barley, and their hybrids. Rice (Oryza sativa) does not contain gluten. However, processed rice products may be cross-contaminated with gluten-containing grains if produced in shared facilities. Common causes of gluten-related issues include celiac disease (an autoimmune condition), wheat allergy (IgE-mediated), and non-celiac gluten sensitivity (NCGS). In celiac disease, gluten triggers damage to the small intestine lining; the only treatment is a lifelong gluten-free diet. NCGS presents with symptoms like bloating, fatigue, or headaches without detectable celiac or allergy markers. Evidence for NCGS is moderate as no specific biomarker exists. Consumers should be aware that commercial tests for gluten sensitivity are often unvalidated. If celiac disease is suspected, medical evaluation with serology and duodenal biopsy is essential.