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For years you’ve relied on C4 Extreme® to help you raise the bar and push limits. C4 50X™ is the next step for you, the most extreme competitor. Its formula features approximately 50% more of the active ingredients per scoop that were key to power of the original C4 Extreme®. C4 50X™ also has two new ingredients: the patent- pending TeaCor™, an integral part of C4®, and patented XCELICOR™, the latest innovation in energy--the X-factor ingredient in C4 50X
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