Furthermore, Wessel et al. [44] found that plasma RBP4 levels were correlated with levels of large very low-density lipoprotein cholesterol and small low-density lipoprotein particles, indicating a possible involvement of RBP4 in the proatherogenic plasma lipoprotein profiles in subjects with T2DM and even without T2DM. Here, RBP4 is linked to type 2 diabetes mellitus.