ist reis glutenhaltig — what are common causes?

Rice is naturally gluten-free. Gluten is found only in certain grains – primarily wheat, rye, barley, and their hybrids (e.g., spelt, Khorasan wheat). Oats are often contaminated unless labeled 'pure oats'. Rice (all varieties: white, brown, wild) contains no gluten and is recommended for celiac disease and gluten sensitivity. Common causes of gluten-related symptoms include: 1) Celiac disease – an autoimmune condition triggered by gluten, causing intestinal damage. 2) Non-celiac gluten sensitivity – symptoms without antibodies or villous atrophy. 3) Wheat allergy – an IgE-mediated reaction. In practice, hidden gluten sources (soy sauce, spice blends, processed foods) and cross-contamination in the kitchen are frequent pitfalls. The evidence is strong (clinical practice, guidelines), but the provided context lacks specific sources. Therefore, evidence is rated as 'practice'.