The effects of Red Bull Energy Drink, which includes taurine,
glucuronolactone, and caffeine amongst the ingredients, were examined over
3 studies in a total of 36 volunteers. Assessments included psychomotor
performance (reaction time, concentration, memory), subjective alertness and
physical endurance. When compared with control drinks, Red Bull Energy
Drink significantly (P 0.05) improved aerobic endurance (maintaining
65–75% max. heart rate) and anaerobic performance (maintaining max.
speed) on cycle ergometers. Significant improvements in mental performance
included choice reaction time, concentration (number cancellation) and
memory (immediate recall), which reflected increased subjective alertness.
These consistent and wide ranging improvements in performance are
interpreted as reflecting the effects of the combination of ingredients.