Milk for muscle mass plays a very important role, due to its composition. Since it is high protein (for muscle mass), as well as a large amount of calcium (strengthens bones) and carbohydrates. There is no fat, skim, and with any percentage of fat. Sportsmen, as a rule, try to drink milk with a minimum fat percentage. As written above, not only the milk consumed by the athletes, and also other dairy products. This can include all kinds of yogurt, cottage cheese, simply put dairy products. :) :) :) Not only plain milk is ideal for muscle growth. Widespread milk powder for building muscle mass. In composition it is the same milk, but reduce it to a powder state. Usually it is diluted with water or some other liquid.