As a stimulant, caffeine can definitely increase your energy level. Did you know it can decrease it, too? It all depends on how sensitive you are to caffeine, and when and how much you consume.
Caffeine does help increase alertness, so having a cup of coffee before going to a meeting or starting on a project can help sharpen your mind. What about energy drinks? While increasingly popular, there’s really no magic formula here. What gives these drinks their jolt is good old-fashioned caffeine. Caffeine content varies widely among energy drinks. Many contain as much or more caffeine as a cup of coffee, along with loads of sugar.