Red Bull Energy Drink contains caffeine that helps to improve concentration and increase alertness; contains B-group vitamins (niacin, pantothenic acid, B6, B12) which contribute to the reduction of tiredness and fatigue; contains real sugar, a fast-absorbing form of carbohydrate involved in biological processes and an energy source for the brain and muscles; contains taurine, an amino acid that occurs naturally in the human body and is involved in regulation of water and electrolyte balance at the cellular level; water is the main ingredient.