ISOLYZE is 100% pure, cold-filtered, whey protein isolate. Its the highest yield whey protein available on the market with an amazing 27 grams of protein per 29 gram serving size. ISOLYZE has no carbohydrates, no lactose (milk sugar), and no fat. Its the purest and most biogically available source of whey protein on the planet. At SPECIES, we use a sophisticated cold filtration system that carefully separates out the delicate whey protein without damaging it. This procedure has the added benefit of preserving 3 valuable components of whey immunoglobins, lactoferrins, and glycomacropeptidesthat are necessary for optimal immune system function and protein synthesis reactions. And if all this werent enough, ISOLYZE tastes great too! Gone are the days of the chemical- or sour-tasting whey isolates! With ISOLYZE, you get the best of both worlds great quality and great taste!