What’s Inside The Can Red Bull Energy Drink’s special formula contains ingredients of high quality. Caffeine: One of caffeine’s primary actions in the human body is a stimulating effect on cognitive functions. Caffeine helps to improve concentration and increase alertness. One 250ml can of Red Bull Energy Drink contains 80mg of caffeine. Taurine: Taurine is an amino acid, naturally occurring in the human body and present in the daily diet. It is involved in a wide range of biological processes. B-group vitamins: Vitamins are essential micronutrients that are required for maintaining normal body functions. Niacin and vitamin B6 contribute to the reduction of tiredness and fatigue as well as to normal energy-yielding metabolism.