FABP4 and type 2 diabetes mellitus: Prospective trials have shown that FABP4 plasma level is associated with the development of metabolic syndrome and type 2 diabetes mellitus and predicts cardiovascular events (Xu et al., 2007; Ohyama et al., 2013; Rodríguez-Calvo et al. , 2017; Höbaus et al., 2018).