Great for pro athletes, Red Bull Sugarfree can help keep you going for longer with a specially formulated blend of invigorating ingredients that work on your body and mind. Caffeine – Used across the world and throughout the centuries, Caffeine is a naturally sourced, advanced stimulant. B-Group Vitamins – Essential micronutrients that are required for maintaining your body’s normal functions. Taurine – An amino acid that is naturally occurring and found in your daily diet it is important to a wide range of biological processes. Aspartame and Acesulfame K – Sugar substitutes. Alpine Water – The main ingredient in Red Bull which helps you keep hydrated.