This study will evaluate the effects of whole vs. nonfat milk consumption on body composition, cardiometabolic disease risk factors, and dietary quality.
Inclusion Criteria: * Aged 9 to 12 years * BMI ≥75th percentile for sex and age * Residence in the Greater Boston catchment area Exclusion Criteria: * Aversion to nonfat or whole milk * Physician diagnosis of major medical illness, eating disorder, or milk allergy (lactose intolerance not exclusionary as lactase treated milk can be provided) * Plans to move away from the Greater Boston catchment area during the study period * Plans to be away from home for ≥5 weeks during the study period (e.g., extended summer vacation) * Change in body weight exceeding 10% during prior year * Recent adherence to a special diet * Chronic use of any medication or dietary supplement that could affect study outcomes * Another member of the family (first degree relative) or household participating in the study