Cellucor has improved their original C4 formula to give you an even greater boost during your training. This new formula includes TeaCor, a form of Theacrine, which acts similarly to caffeine to give you an even greater energy boost. Unlike caffeine, you won’t quickly build a tolerance to theacrine, so you don’t have to worry about C4 losing its effectiveness over time. To enhance endurance, C4 uses beta-alanine which allows you to push yourself even further while exercising. Maximize your gains, with C4 Original!