C4 By Cellucor, Original, Pre Workout now available with the freshest stock and and includes the breakthrough ingredient, TeaCor™ for improved energy that. Dec 1, Cellcuor's C4 has dominated the pre workout market, but is not very cost effective . Cellucor C4 Ingredients: New Formula vs Old Formula. All pre-workouts are not born equal. C4 Extreme Energy pre-workout drink has more focus and more endurance to enhance your fitness journey. C4 50X by Cellucor Review Pre-Workout 6 days ago Is Cellucor C4 the best pre workout? Review of Cellucor ingredients & results. Cellucor C4 customer reviews & feedback. As America's #1 selling pre-workout, C4 Original lives up to its solid products from Cellucor but be careful to read the ingredients because too much isn't good. We review the extremely popular C4 original pre workout from Cellucor. We look in detail at the ingredients, check out the side effects and tell you from our.