C4 Sport is packed with active ingredients for Hard Hitting Energy™ and fatigue-fighting muscular endurance. Every scoop delivers an explosive blend of 135mg Caffeine and for unrivaled focus and energy. CarnoSyn® Beta-Alanine helps keep fatigue at bay. Creatine monohydrate and Arginine AKG support lean muscle growth and improve strength. C4 Sport carries the Informed Choice logo. This means that the product has gone through a full manufacturing audit and is regularly tested for a wide variety of WADA banned substances to ensure safety for sport.