Nature’s Best – Nature’s Best Isopure Zero Carb contains 50 grams of 100% Whey Protein Isolate. Any and all impurities typically found in most whey proteins have been removed to provide you with a great tasting, lactose free, glutamine enriched state of the art carbohydrate free protein supplement. Nature’s best wanted you to know that you’re purchasing the best product available on the market. Their protein source is clearly identified as 100% Whey Protein Isolate. They didn’t try to confuse you by listing a protein blend that doesn’t tell you how much of the product is superior whey protein isolate and how much is why protein concentrate or sweet whey or some other inferior protein source.Furthermore, Isopure contains 0g of sugar and comes with glutamine, vitamins, minerals and nutrients to keep your muscles tough, lean and ready to rock it.