The Science Behind The Size Product: A superior blend of high quality bioavailable 100% Whey Proteins: WPC and WPI. A premier concentrate that is 100% instantized, quick dissolving and easy-to-mix with a rich, refreshing taste. Result: Stimulates muscle protein, which maximizes muscle growth that occurs after exercise, by enhancing muscle building and lean tissue mass. Also, increases muscle performance and improves post-workout recovery by reducing aches and pains. Science: Clinical studies show that 100% whey protein is one of the best muscle building proteins available, providing a rapid drive of amino acids to skeletal muscle tissue, thereby increasing the effects of weight training. Enhanced muscle protein increases muscle growth to maximize gains. Research also shows that 100% whey protein has one of the highest protein qualities of all proteins, and has one of the highest Protein Efficiency Ratios, providing more amino acids than most other proteins.