Mean serum oxytocin in students with MetS was significantly higher compared with students without MetS (10.34 pg/ml and 9.15 pg/ml, respectively, P<0.0001); our findings were supported by Szulc et al.'s cross-sectional study [17], which was conducted in 540 volunteer men, whose ages were between 50 and 85 years old. Here, OXT is linked to metabolic syndrome.