ist vollkornreis glutenfrei — what does this mean exactly?

Yes, whole grain rice is naturally gluten-free. Gluten is a protein found in wheat, rye, barley, and their hybrids – not in rice. However, cross-contamination can occur during processing (e.g., shared mills, seasoning mixes, or pre-packaged meals). For individuals with celiac disease or non-celiac gluten sensitivity, it is advisable to choose products explicitly labeled 'gluten-free'. The evidence is strong: rice lacks gluten proteins, a fact well-established in food chemistry and celiac guidelines. Caveat: The question 'is whole grain rice gluten-free' refers to the raw grain itself, not to processed rice dishes. Consumer DNA tests for gluten sensitivity (e.g., HLA-DQ2/DQ8) can provide risk information but are not diagnostic. If symptoms persist despite a gluten-free diet, medical evaluation is recommended.