The European Food Safety Authority (EFSA) has declared that "analytical and clinical studies" should examine whether commonly-used finings, used to cleanse some alcoholic drinks of impurities, cause potentially dangerous allergic reactions.

Its current concerns focus on fish products, including gelatine and isinglass; egg products including albumin and lysozyme; and milk products such as casein, used as "processing aids" in wine and cider that "may partly remain in the finished products". These are all known as major allergens, except isinglass.

The EFSA wants to check whether residues can spark allergic reactions, branding "currently available experimental data (as) preliminary and not sufficient to exclude residual allergenicity".