Fasting FGF19 levels decreased in order from the NC group [245.03 (126.23–317.43) pg/mL] to the N-DM group [170.05 (89.01–244.70) pg/mL] and finally to the DM group [142.25 (55.55–187.58) pg/mL] (p < 0.05; Table 1, Fig. 1). Here, FGF19 is linked to diabetes mellitus.