The galactose‐α‐1,3‐galactose (α‐Gal) epitope is involved in red meat allergy. As α‐Gal is structurally similar to the blood group B‐antigen, we explored the relationship between the immune responses to α‐Gal‐ and the B‐antigen in red meat‐allergic patients compared to healthy A/O or B blood donors. Fifteen healthy donors were IgE positive to α‐Gal, of which 3 had blood group B. The allergic patients had significantly higher α‐Gal IgE levels compared to the healthy donors.