Whether you're a passionate coffee drinker, a cola fan, or an energy drink junkie: for lovers of caffeinated beverages, life without them is often unimaginable. These drinks are not only delicious, but caffeine also has a stimulating effect, increasing alertness and making you feel more awake after consumption. However, with daily high caffeine intake, tolerance develops, and the stimulating effect diminishes. This book provides an overview of caffeine, caffeinated beverages, and their effects.