A High Quality Whey Protein derived from cowâs milk and is considered a complete protein because it contains all of the essential amino acids that can only be taken in through diet from the Worldâs #1 seller of Whey protein. Because of ultra-filtering and other processes ON Performance Whey has much of the fat carbohydrates and other undesirable components removed leaving you with an easy-to-mix powder providing 24 grams of whey protein with just 1 gram of sugar and 1 gram of fat.