Various workers (Crasilneck and Hall; Gross; Thakur) have demonstrated hypnosis being very successfully used in the treatment of both bulemia and anorexia.
In one study of anorexia, Nash and Baker found 53% of patients improving without hypnosis, and 76% improving with hypnosis.
Hypnosis for weight management
In a study-of-studies, Kirsch, Montgomery, and Sapirstein analysed cognitive-behavioral therapy (for all sorts of issues) with and without additional hypnosis. The addition of hypnosis substantially improved results in at least 70% of clients. Effects seemed particularly pronounced for treatment of obesity: clients who had received hypnosis continued to lose weight after the treatment ended. These results were particularly striking because of the few procedural differences between the hypnotic and non-hypnotic treatments.