abstract:CytoSport is a Benicia, California, manufacturer of sports-oriented nutritional products, or "supplements". It offers a line of protein-enhanced powders, shakes, and bars has broken into the mainstream market with a ready-to-drink form of protein supplement "Muscle Milk", a non-dairy beverage which is trans-fat-free, lactose-free, contain no high fructose corn syrup and is shelf stable.