Isolyze has no carbohydrates, no lactose (milk sugar) and no fat. It is the purest and most biogically available source of whey protein on the planet. Isolyze is 100% pure, cold-filtered, whey protein isolate with the highest yield of whey protein available on the market with an amazing 27 grams of protein per 29 gram serving size. 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 three valuable components of whey immunoglobins, lactoferrins and glycomacropeptides that are necessary for optimal immune system function and protein synthesis reactions.