Caffeine is used by nearly 100 percent of adult men and women, making it the most widely used stimulant drug in the world. Caffeine has also become more popular amongst endurance athletes as an ergogenic (energy generating) aid since it was removed from the list of banned substances list in 2004 (although it is still banned in high quantities). While research into the performance enhancing effects of caffeine is controversial, many athletes claim caffeine enhances performance.




Nutrition






