Eating disorders, including anorexia nervosa, bulimia nervosa, binge-eating disorder, and atypical eating disorder (eating disorder not otherwise specified or NOS), are estimated to occur in 5-10 million young and adult women and one million males in the United States. The etiology of eating disorders is complex and appears to include predisposing genetic factors and serotonin dysregulation, as well as psychological factors that include a history of trauma and childhood sexual abuse. Both anorexia nervosa and bulimia nervosa are medical conditions complicated by multiple neuroendocrine dysfunctions, nutritional deficiencies, and psychiatric diagnoses. Medical complications, specific nutritional deficiencies, and research involving the therapeutic use of inositol and zinc are reviewed.