RBP4 and metabolic dysfunction-associated steatotic liver disease: However, data regarding other adipokines, including resistin (RETN), visfatin (i.e., extracellular nicotinamide phosphoribosyltransferase (eNAMPT)), retinol-binding protein-4 (RBP-4), chemerin, adipsin, obestatin, omentin, and vaspin, in NAFLD are inconclusive or limited [40].