The DASH (Dietary Approach to Stop Hypertension) diet emphasizes increased intakes of low-fat dairy products, fish, chicken, lean meats, fruits, vegetables, nuts, whole grains, and legumes. This study examined the effects of adherence to a DASH-style eating plan and its components on the change in body mass index (BMI) in a racially diverse sample of adolescent girls over a 10-year follow-up period. Those who consumed 2 or more servings of fruit per day had the smallest gain in BMI over time and the lowest BMI at the end of follow-up. Higher intake of low-fat dairy products led to lower BMI gains as well. There was no difference in BMI according to intake of vegetables. Greater consistency with the DASH eating plan resulted in lower excess weight gains among girls from early adolescence to young adulthood.