IGHE and food allergy: IgE antibodies against the carbohydrate epitope galactose‐α1,3‐ galactose (α‐Gal) are the cause of a novel type of food allergy, the α‐Gal syndrome (AGS), which is characterized by severe allergic reactions, for example, angioedema, urticaria, and anaphylaxis, 2–7 h after the consumption of mammalian products.