Prolab Nutrition?s Pure Whey is a great tasting, high quality, whey protein formula. We start with only the finest raw material and put it through a series of refined, sensitive filtration steps. Micro and ultra filtration at low temperature produces a super clean, undenatured high protein, nitrogen-boosting powder. Pure Whey helps support the protein needs of heavy athletic training and helps maintain positive nitrogen balance (PNB). PNB is the perfect environment for muscle growth, recuperation and repair. Don?t slow your own progress, use Prolab Nutrition?s Pure Whey. It mixes easily, is aspartame free and is enhanced with glutamine peptide.