Make your training hit harder with C4 Ultimate. This is for those that don't have limits in the gym. It packs a potent punch of 300mg of Caffeine and Creatine for an ultimate high-stim energy experience that makes your old PR feel like your new warm up weight. Leave no reps in the tank with enhanced muscular endurance from clinically studied CarnoSyn® Beta Alanine and Citrulline Malate. C4 Ultimate will challenge you for one more rep, one more set, and to pick up that heavy dumbbell you've been thinking about for weeks.