Eating disorders in young women are often associated with a number of comorbid conditions, including mood disorders and cognitive problems. Although group therapy is often used as part of overall treatment for eating disorders in many types of settings, specific nutritional interventions used in such settings have rarely been evaluated. In this study, I evaluated the effects of a nutritional intervention used by 78 girls, aged 12-18 years, at a private school. My results showed that nutritional knowledge increased following intervention, but attitudes toward eating healthy did not change.