Researchers are now investigating the potential use of intranasal oxytocin in the treatment of depression as an adjunct to selective serotonin reuptake inhibitors (Emiliano et al., 2007), anxiety (Guastella et al., 2009), and more recently, anorexia nervosa (Kim et al., 2014) with promising preliminary results findings. This evidence concerns the gene OXT and major depressive disorder.