Red Bull Drinks - Red Bull is the brand name of a famous Austrian carbonated soft drink. Sold as an energy drink and to combat mental fatigue, it contains about 5 teaspoons of sugar, 1000 mg of taurine, 600 mg of glucuronolactone, B-complex vitamins and 80 mg of caffeine (as much as one cup of coffee). It is popular as a mixer, notably with vodka.