Just because it says "Whey Protein" on the label does not mean you are getting the complete muscle-building benefits new science has to offer. In fact, if you are using another protein besides VP2 Whey Isolate then you are not putting the latest science to work for you. Science that could accelerate muscle growth. Building lean solid muscle requires a daily intake of protein. Muscle is protein. Without this essential nutrient all the training in the world won't help you. To build muscle your body requires extra protein for tissue repair and growth. But just eating extra protein to feed trained muscles hardly makes the grade when maximum growth is what you are looking for. Contains: Pure Whey Peptide Isolate, 100% Hydrolyzed Whey Fractions, "Bio-Active" Peptide Isolates, Highest Nitrogen Retention, Gram for Gram More Protein Than Any Other Protein Made.