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ISOLYZE™ is 100% pure, microfiltered whey protein isolate—no sugar or fat added. Each bottle of ISOLYZE contains an incredible 50 grams of muscle building protein. And due to advanced filtering techniques, ISOLYZE still possesses high percentages of muscle-sparing and immune system-enhancing immunoglobulins, lactoferrins, and glycomacropeptides. And if all that weren’t enough, ISOLYZE tastes great.