Natures Best - Isopure Whey Protein Isolate Powder Unflavored - 1 lb. (454 g) Isopure Whey Protein Isolate powder contains 25 grams per serving of unadulterated 100% Whey Protein Isolate stripped of fat carbs fillers sugars and lactose. Easy to add to any food and beverage (hot or cold) and so pure