Red Bull Gives You Wiiings - Stay alert Red Bull Sugarfree contains caffeine that helps to improve concentration and increase alertness. - Reduce fatigue Red Bull Sugarfree contains B-group vitamins (niacinamide, pantothenic acid, B6, B12), which contribute to the reduction of tiredness and fatigue. - Balance your body Red Bull Sugarfree contains taurine, an amino acid that occurs naturally in the human body and is involved in a range of processes including regulation of water/electrolyte balance at the cellular level. Each 250 ml can of Red Bull Sugarfree contains 80 mg of caffeine, about the same amount as in a cup of coffee. Caffeine helps to improve concentration and increase alertness. Red Bull Sugarfree is gluten-free, wheat-free, lactose-free, dairy-free, and vegan.