Inclusion Criteria:

• BMI >85th% for age and sex
• Weight gain over the last 6 months of >5% than expected on the growth curve
• 12-17 years of age

Exclusion Criteria:

• Subjects with intolerance to dairy products (e.g., lactose intolerance) will be excluded from entering into the study.
• Subjects must not have a history of clinically significant cardiac disease, congenital heart disease, any clinically significant abnormal cardiac condition, or be known to have a clinically significantly abnormal ECG. Specifically excluded conditions include coronary artery disease, clinically significant cardiac arrhythmias, and congestive heart failure.
• Subjects must not have a history of anorexia nervosa, untreated hypothyroidism (TSH greater than 4.0 mU/L for a second generation test), malignancy, pathophysiologic or genetic syndromes associated with obesity (i.e., Cushing’s syndrome, Turner’s syndrome, Prader Willi syndrome), major psychiatric illness such as bi-polar disorder, ADD, major depression, bulimia, schizophrenia, or psychosis.
• Subjects may not participate in any weight management program, except for that in this study, during this pilot. Subjects may not use prescription or over-the-counter (or herbal) weight control medication during the trial.
• Subjects must not have a history of alcohol or drug addiction or substance abuse within the previous 2 years.