Drinking milk after a workout can boost muscle growth by stimulating protein synthesis. While milk alone may not boost muscle growth as much as whey protein, it still provides benefits. Milk also aids in rehydration after exercise better than water or sports drinks due to its sodium and potassium content. In addition, a study found subjects who drank fat-free milk after strength training gained 40% more muscle mass and lost 2 pounds more body fat than those who drank soy or carb drinks. Finally, cows that graze on grass produce milk with 500% more CLA than cows fed a standard grain-based diet.