Flavor with other natural flavors. 240 mg caffeine. 260 calories per can. Caffeine Content: 240 mg/16 fl oz. Guarana. B-Vitamins. Taurine. rockstarenergy.com. SmartLabel: Scan for more food information or call 1-800-433-2652. Instagram. Rockstarenergy. We’re here to help. 800.433.2652. Please recycle.