It also reduces infant mortality andthe occurrence of infections, allergies and obesity, in addition to promoting therelease of oxytocin, a hormone that stimulates feelings of pleasure and well-being,acting on breast milk secretion, a rich source of nutrients and antibodies, beingthe most complete and effective food to nourish the newborn, as it strengthens itsimmune system(7,30). The gene discussed is OXT; the disease is obesity due to melanocortin 4 receptor deficiency.