Whey Protein Isolates are 90% pure protein by weight. They are the purest and most expensive form of whey protein that exists. That's why they are the first ingredients you read on the 100% Whey Protein label. By using Whey Protein Isolates as our primary protein source, we're able to pack 23 grams of the purest, muscle-building protein per serving, and a lot less of the fat, cholesterol, lactose, and other stuff that you can do without. There's no question this is the standard by which other whey proteins are measured. Beyond the Basics: Exclusive blend of Microfiltered and Ion-Exchange Whey Protein Isolates, Ultrafiltered Whey Protein Concentrate, and HYDROWHEY Hydrolyzed Whey Peptides. HIGHER PROTEIN PERCENTAGE (23 grams of protein; 81% protein by weight). Includes HYDROWHEY, strategically hydrolyzed, low molecular weight whey peptides to make protein faster acting. Contains LACTASE and AMINOGEN digestive enzymes to enhance utilization. WHEY PROTEIN MICROFRACTIONS including Alpha-lactalbumin, Glycomacropeptides, Beta-lactoglobulin, Immunoglobulin G (lgG), Lactoferrin, Lactoperoxidase, and various growth factors. Over 3 grams of GLUTAMINE and glutamine precursors. More than 5 grams of BCAAs (Leucine, Isoleucine, and Valine) in each scoop.