Elite Casein? helps to keep your muscles supplied with a steady stream of amino acids, the building blocks of muscle protein. Casein is a unique protein derived from milk that breaks down more slowly in the digestive system which increases satiety and provides a slower release of muscle-building amino acids. So if your goal is to build muscle or avoid muscle protein breakdown in between meals or during sleep, Elite Casein is an excellent protein choice. Elite Casein uses a cross-flow microfiltration processing to help preserve the natural state of casein protein's important muscle building properties. It is formulated by in-house research and development scientists by carefully selecting ingredients that meet strict quality standards and specifications. All Elite Casein flavors are developed in-house so they are a delicious way to support those gains and your hard work. Instantized formulas provide easy mixing, ensuring that you get world class taste and a smooth, rich consistent in every casein shake. Contains both Milk and Soy.