Whey protein isolates are the purest form of whey protein that exist. Hydrowhey strategically hydrolyzed whey peptides are some of the fastest acting and most expensive. That's why they're among the first ingredients you read on the gold standard 100% whey label. By using whey protein isolates and hydrowhey as primary ingredients, we're able to pack 24gm of the fastest, muscle-building protein into every serving-with a lot less of the fat, cholesterol, lactose and other stuff that you can do without. There's no doubt that this is the standard by which all other whey proteins are measured.