Cellucor iD Series C4 Pre Workout Original Margarita Dietary Supplement with explosive energy, heightened focus and an overwhelming urge to tackle any challenge. The C4 pre-workout to help them turn their ambitions into achievements. The C4 original lives up to its solid reputation with a classic formula for advanced energy, endurance, focus and pumps. Whether you're just starting a fitness journey or you're striving to reach that next level, C4 original will help you unlock your full potential. Contains carnosyn beta-alanine, an amino acid, which converts to a compound in your body called carnosine. It is the only patented and clinically studied form of beta-alanine that has been shown to support muscular endurance. Available in 390 g.