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. RIVALWHEYs 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.