Things You Should Know to Navigate the World of Energy Drinks. Due to their ability to provide a rapid energy boost during hectic days or demanding tasks, energy drinks have become a common fixture in the lives of many individuals. Although they might provide you a quick energy boost, it's important to know their composition, effects, and possible risks so you can choose wisely when consuming them. Parts and Results: 1. Caffeine: The main component of most energy drinks, caffeine activates the central nervous system to improve focus and alertness. On the other hand, a high caffeine intake might cause jitters, anxiety, sleeplessness, and accelerated heart rate. To prevent adverse effects, it's critical to keep an eye on your total intake of caffeine from all sources. 2. Sugar and Sweeteners: To improve flavor, a lot of energy drinks contain a lot of sugar or artificial sweeteners.