The Optimum Nutrition Gold Standard 100% Whey protein is among the best ones money can buy. Its primary ingredient is whey protein isolate (WPI) along with premium ultra-filtered whey protein concentrate (WPC). It contains 24 grams of muscle-building protein in every serving, nearly 79% protein by weight, over 4 grams of glutamine & glutamine precursors, and over 5 grams of BCAAs (Leucine, isoleucine, and Valine). It’s a superior-quality powder with excellent detail to mixability!