That's one of the reasons I mentioned I wouldn't touch a Red Bull.
Ingredients: Carbonated Water, Sucrose, Glucose, Citric Acid, Taurine, Sodium Bicarbonate, Magnesium Carbonate, Caffeine, Niacinamide, Calcium Pantothenate, Pyridoxine HCI, Vitamin B12, Natural and Artificial Flavors, Colors.
In other words...
Carbonated Water, Sugar, Sugar, Flavoring, An Amino Acid, Baking Soda, An Inorganic Salt, Caffeine, Vitamin B3, Vitamin B5, Vitamin B6, Vitamin B12, and Flavors & Colors of unknown origin (due to loose labeling laws).
[Product Label]