C4 Energy is a brand of non-alcoholic energy drinks owned by Nutrabolt. It debuted in 2018 as a ready-to-drink carbonated extension of the company’s C4 pre-workout line,[1] and later expanded into multiple ranges including C4 Performance Energy (16 oz; labeled 200 mg caffeine), C4 Smart Energy (12 oz; labeled 200 mg caffeine from “natural” sources), and C4 Ultimate Energy (16 oz; labeled 300 mg caffeine).[2][3][4] In 2022, Keurig Dr Pepper (KDP) announced a strategic partnership with Nutrabolt that included U.S. distribution for C4 Energy and an equity investment of approximately 30%.[5][6]