According to our previous study on leptin [23], plasma ADPN was measured in two age-matched cohorts consisting of 41 healthy subjects (HC) and 62 patients: thirty-four with a diagnosis of Anorexia Nervosa (AN), fourteen of Bulimia Nervosa (BN), and fourteen of Binge-Eating Disorder (BED). This evidence concerns the gene LEP and anorexia nervosa.