GCDH and type 2 diabetes mellitus: Specifically, 13 CpG sites exhibited strong colocalization with T2DM, including ACSL1 (cg03977443), COQ4 (cg14458731), COX19 (cg22301154), DHRS4 (cg20021513), DNAJC11 (cg01053213, cg24361350), GCDH (cg17414007, cg21050076), ISCA2 (cg16374328), MTFMT (cg25698089), SLC25A16 (cg01284033), TRUB2 (cg14458731), and TUFM (cg00348858).