Alpine's Green Tea flavored energy drink provides essential pre-workout supplements. For athletes who desire to stay hydrated and get a boost of energy to kick off a workout. Natural ingredients included to help maximize strength by increasing vigor and stamina. Includes caffeine from green tea, a stimulant of the central nervous system, which increases your alertness and improves physical endurance. Also includes citrulline malate, which is an amino acid that improves the blood supply and the quality of muscle oxygenation.