ITLN1 and obesity due to melanocortin 4 receptor deficiency: Serum omentin-1 level has no significant relationship with cholesterol, TAG, HDL-C, and LDL-C, in both groups, and a few other studies also found no correlation.12,13 It is proposed that obesity negatively controls omentin expression and release into the circulation.12 However, there was no difference in the BMI of the present study subjects, so it excludes any influence of body weight, BMI, or obesity.