Take your workout to the next level with help from Cellucor C4 Ultimate Sour Batch Bros Pre-Workout 20-Servings. The formula delivers enhanced training benefits, strong pump power and is free from artificial flavors and dyes. The NitraMax (NO3-C) is an advanced compound that delivers dual-pathway nitric oxide (NO) support for reliable performance, while the fully disclosed formulation issues a double dose of pump-boosting nitrates.