Several clinical studies have revealed that the levels of omentin-1 in patients with metabolic syndrome, dyslipidemia, and hypertension were reduced, and circulating omentin-1 was negatively correlated with leptin, TG, TC, LDL-C, and blood pressure and positively correlated with adiponectin and HDL-C [6, 10, 11]. Here, LEP is linked to metabolic syndrome.