Red Bull Zero contains the same key ingredients as Red Bull Energy Drink (caffeine, taurine and B-group vitamins) but is made with a combination of low and no-calorie sweeteners (Sucralose, Sodium Cyclamate, Sodium Saccharin).Caffeine helps to improve concentration and increase alertness.B-group vitamins (niacin, pantothenic acid, B6, B12) contribute to the reduction of tiredness and fatigue.Taurine, an amino acid that occurs naturally in the human body, is involved in a range of processes including regulation of water/electrolyte balance at the cellular level.For more information, refer to the nutrition label on the can and visit the Zero ingredient page.