Recently, the European Prospective Investigation into Cancer and Nutrition (EPIC)-InterAct case-cohort study conducted on 11,247 incident cases of adult-onset diabetes reported that high fish intake or relatively high ω-3 PUFA plasma levels may partially counteract the increased incidence of T1DM in individuals who are GAD65 antibody positive (Löfvenborg et al., 2021). Here, GAD2 is linked to type 1 diabetes mellitus.