There are currently five specified OSFEDs in the DMS-V with OSFEDs in general also included. The five conditions are Atypical anorexia nervosa, Bulimia nervosa of low frequency and/or limited duration, Binge eating disorder, Purging disorder and Night Eating Syndrome. However, all eating disorders have strong mental health components, which is why effective treatment requires therapy methods which address the psychological aspects of the condition.