C4 Extreme was formulated to deliver explosive energy, powerful performance and endurance, extreme focus, and peak performance.: Take your training to the next level with explosive C4 Energy from 200mg of caffeine. Fuel muscular endurance fight fatigue with 2g of the clinically studied CarnoSyn Beta-Alanine. Legendary zero sugar C4 taste in every scoop. With billions of servings sold, C4 has set the standard in flavor for over a decade. Increase strength and performance with Creatine Nitrate (NO3-T) and NitraMax (NO3-C) technology.