With other natural flavors. Made with real juice. 10 calories (10 calories per serving) + electrolytes. B-vitamins. Taurine. Caffeine. Contains 3% juice. In each serving: Taurine 1000 mg, Caffeine 80 mg. Total Caffeine from All Sources: 160 mg per can. Please recycle. Dispose of properly. www.rockstarenergy.com. 20 calories per can.