Plasma leptin metabolic regulation is preserved in female. Correlation between leptin and BMI (A), fasting blood glucose (B), free triglyceride (C), total cholesterol (D), HDL-cholesterol (E), ratio of total cholesterol/HDL-cholesterol (F), ratio of free triglyceride/HDL-cholesterol (G) and Triglyceride glucose index (H) were calculated in male and female using two-tailed Pearson correlation coefficients. Triglyceride glucose index was calculated as ln[fasting triglycerides (mg/dL) × fasting plasma glucose (mg/dL)/2]. n = 16 males, 27 females.