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.