Prolab N-Large2 is a powerful mass-gaining support formula designed to promote size on the hardest gainers. This potent formula delivers more calories and protein, gram for gram, than our competition. We emphasize the amount of protein per serving since it is the essential nutrient that promotes muscle mass. We use only cross-flow, microfiltered, cold-processed, ion-exchanged whey. This protein has a superior amino acid profile, unbeatable bioavailability, is low in lactose and is instantized for easy mixing without a blender. You simply will not find a protein of this grade used in other weight-gain formulas. This formula also contains a unique blend of carbohydrates to help fuel and support weight training. Fat, although shunned by some, is a highly concentrated energy source (double that of protein or carbohydrates). Fat is also a necessary component of all cell membranes, nerve covering, digestive secretions and most importantly, hormone production. A diet too low in fats may actually impair growth. For these reasons, small amounts of fat are contained in N-Large2. For best results, combine N-Large2 with a sensible diet and intense training program.