Some studies have reported the beneficial effects of incretin mimetics as an effective therapy for hyperphagia and obesity in PWS, considering its potential effects on ghrelin suppression, central appetite suppression (through its action on pro-opiomelanocortin POMC/CART neurons and cocaine- and amphetamine-regulated transcripts in the arcuate nucleus (195),), increased energy expenditure (EE) and stimulation of insulin secretion, which could counterbalance the hypoinsulinemia reported in PWS (196–200). The gene discussed is INS; the disease is obesity due to melanocortin 4 receptor deficiency.