All Dietary supplements under the Nutrabolt umbrella (C4, Cellucor and Xtend) are only formulated with safe, legal dietary ingredients of course. For pre and current employment, law enforcement, armed forces, etc., they do not have the ability to show as a false positive or positively cause anyone to fail for an illegal stimulant regarding a Urinalysis.
However, if you are an athlete, we recommend contacting your trainer or testing facility to make sure that you are able to use the product, as athletes must abide by specific rules that may differ and be governed by each organization.
Do know that for these athletes, C4 Energy, C4 Smart Energy and C4 Sport are compliant NSF Certified for Sport® products. This means that the products have been subjected to rigorous testing and protocols required to become certified for sport. This program is recognized by the NFL, NFL Players Association, MLB, MLB Players Association, PGA, LPGA, and Canadian Centre for Ethics in Sports.