100% whey gold standard is the best-selling whey protein from optimum nutrition. Whey protein isolates are 90% pure protein by weight. They are the purest and most expensive form of whey protein that exists. Thats why they are the first ingredients you read on the on 100% whey gold standard label.24g of pure muscle building powerby using whey protein isolates as our primary protein source were able to pack 24 grams of the purest muscle-building protein per serving with a lot less of the fat cholesterol lactose and other stuff that you can do without. Theres no question optimum 100% whey gold standard is the standard by which other whey proteins are measured.