The sports nutrition industry's best-selling whey protein powder - Optimum Nutrition (ON) 100 % Whey Protein - represents the gold standard of protein quality. A High Quality Whey Protein derived from cow's 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 World's No.1 seller of Whey protein. Made in GMP compliant company owned and operated facilities in the U.S.A., Optimum Nutrition (ON) Whey Protein uses pure Whey Protein Isolates as the primary ingredient. Because of ultra-filtering and other processes, ON Whey has much of the fat, carbohydrates and other undesirable components removed, leaving you with an easy-to-mix powder providing 22 grams of whey protein with just 1 gram of sugar and 1 gram of fat. The ""Gold Standard"" for Protein Quality!