Formulated by leading exercise physiologists, Glutamine and Arginine enhanced Endurox R4 delivers the hydration effectiveness of the leading sports drink, and: extends endurance by 55%; decreases post-exercise muscle damage by 36%; reduces free radical build-up by 69%; and increases insulin levels by 70% to speed the replenishment of muscle glycogen and the rebuilding of protein. 270 calories, 53g carbohydrates, 14g protein, 1g fat. 4.56 lb. can. = 28 Servings.