Whey Protein Isolates are the purest form of whey protein that exists. Sports Health Labs Whey Isolate consists of proteins strategically broken down (hydrolyzed) into smaller pieces called peptides for faster utilization by the body. Both are costly to use, but whey protein isolates and Sports Health Labs Whey Isolates are the best whey proteins that money can buy. That's why they're the first few ingredients you read on the Whey Protein label. By using whey protein isolates as primary ingredients, we're able to pack 39 grams of the fastest, muscle-building protein into every serving with a lot less of the fat, cholesterol, lactose, and other stuff you can do without. There's no doubt that this is the standard by which all other whey proteins are measured.