ProGain is a patented high-calorie, high-nitrogen, peptide-based supplement that features many of the macro- and micronutrients necessary for promoting healthy weight gain and lean muscle mass, as well as maintaining positive nitrogen balance. Provides excellent nutrition in the form of a unique combination of high quality protein from enzymatically hydrolyzed whey protein, and carbohydrate from glucose polymers and pure, crystalline fructose. Provides the antioxidant vitamins A, C, E, and beta-carotene. Provides excellent nutrition that is low in fat and suitable for those who are lactose- or gluten-sensitive; designed for optimal absorption and tolerance. Available in Natural Chocolate and Natural Vanilla flavors.