A recent study has found that standard tests may not always detect gluten residues in barley beer. This is significant because some beers labeled as "gluten-free" may still contain small amounts of gluten that could trigger celiac disease. The study, conducted by the Leibniz Institute for Food Systems Biology, compared two antibody-based testing methods. Researchers found that these methods failed to detect gluten residues in some barley beers. The implications of this study are that consumers who rely on standard tests to ensure the gluten content of their beer may be at risk of consuming gluten residues.

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