From the Manufacturer's Label:
50 grams of 100% pure whey protein isolate and not a carb in sight. And it still comes with glutamine and nutrients, but no lactose or impurities, so it's easy to drink.
Nature's Best set out to create a product that didn't hide anything from its customers. We wanted you to know that you're purchasing the best product available on the market. Our protein source is clearly identified as 100% Pure Ion Exchange Whey Protein Isolate. We 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 whey protein concentrate or sweet whey or some other inferior protein source.
Manufactured by Nature's Best.