Subjects will be evaluated by a registered dietitian and randomized to diet prescription (55% carbohydrate, 30% fat and 15% protein) vs. the same diet prescription including three servings of supplement powder and fish oil. The research dietitian will develop meal plans based on basal metabolic rate and physical activity. Subjects will be provided a pedometer to wear daily. Any subject in either group who develops symptoms of pancreatic insufficiency will be provided with pancreatic enzyme supplementation.