About this item 24 g fast-acting protein. Made with 100% whey protein. #1 Protein Source = Whey Protein Isolate. Over 5 g BCAAs (leucine, isoleucine, valine.) Enzyme blend. Little fat or sugar. Instantized to mix up quickly, fully and easily. No banned substances - safe for sport. Whey is amongst the most popular protein sources for athletes - and for good reason. Whey proteins are highly digestible, rich in all the essential amino acids (including the three BCAAs), and have a thin consistency that is exceptionally drinkable. RIVALWHEY's 100% whey protein recipe blends high-purity whey isolate (primary protein source, BTW), ultra-filtered whey concentrate, and speedy whey hydrolysate to provide an exceptional balance of clean macros, great taste, unsurpassed quality, and bang for your hard-earned buck. So good it should have been called UNRIVALED WHEY.