Because of its anabolic effects (stimulation of appetite, adiposity, and blood glucose), ghrelin is expected to be clinically applied for treatment of diseases such as cachexia and anorexia nervosa [16,17,18], and clinical trials for the treatment of eating disorders and cachexia with rapid intravenous injection of ghrelin were conducted [19,20]. This evidence concerns the gene GHRL and anorexia nervosa.