Whey Protein Isolates (WPI) are the purest form of whey protein that currently exists. By using WPI as the primary ingredient along with premium ultra-filtered whey protein concentrate (WPC) in Gold Standard 100% Whey, we're able to pack 24 grams of protein into every serving to support your muscle-building needs after training. ON's attention to detail extends to mixability. This superior quality powder instantly mixes using a shaker or a glass and spoon. Whey Protein Isolate (WPI) Main Ingredient. Over 4 Grams of Glutamine & Glutamic Acid in Each Serving. 24g of Whey Protein. 5.5g of Naturally Occurring BCAAs..