The most popular reason is increased alertness and wakefulness. As long as you use caffeine in moderation, you should be fine. Caffeine is one of the most commonly used stimulants among athletes. This is because it can give you an adrenal rush that can improve sports performance. Another positive use of caffeine is caffeine creams. These can be applied to the skin to reduce redness and itching. Believe it or not, caffeine can improve airway function for up to four hours in people with asthma. Study shows that taking 200 mg of caffeine orally daily can improve memory in some people with extroverted personalities and in college