Deep brain stimulation — which uses implanted electrodes to send electrical signals to certain brain regions — has been shown to improve psychiatric symptoms, quality of life, and weight restoration in people with anorexia nervosa. However, due to the very low number of participants, more studies are needed to confirm these preliminary results.[1][2][3]
Intranasal oxytocin has also been studied, but it doesn't appear to have any effect on eating disorder symptoms in anorexia nervosa.[4][5][3]
Social support and mindfulness practices can also help to improve some of the psychological symptoms of anorexia.[6][3]