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Optimum Nutrition's Gold Standard 100% Whey uses pure whey protein isolate as the primary ingredient. Whey protein isolate is our primary ingredient, which has had carbohydrates, fat, and lactose isolated out using sophisticated filtering technologies.

Optimum Nutrition Optimum Nutrition, Gold Standard 100% Whey Protein Powder, 5 lb - Bright Red

Optimum Nutrition Optimum Nutrition, Gold Standard 100% Whey Protein Powder, Delicious Strawberry, 5 lb, 73 Servings - Black

Gold Standard 100% Whey is designed for maximum mixability and superior drinkability.