Caffeine consumption has become commonplace amongst young adults in recent years, with many teens, up to 80 percent, eagerly reaching for coffee or energy drinks on a regular basis. Caffeinated substances are legal, widely used by society, and often touted as having health benefits, yet many teenagers fail to realize that caffeine is also a drug. When misused it can lead to dependency or abuse. This informative anthology examines the various degrees of caffeine use, outlining a variety of perspectives on topics such as caffeine and cognitive performance, caffeine as an addictive substance, and the complexities of caffeine regulation.