Caffeine is widely in the world. Most of people get caffeine from coffee. Coffee addiction is becoming more prevalent around the world. The first reason is that it is tasty and aromatic. Due to its aromatic smell, people like to use it to release their stress during the day. Coffee is a very flavorful and popular beverage that people get addicted to easily. The second reason is that most people drink caffeine in coffee because it has a positive effect on the brain. In other words, it improves and cognitive performance, increases mental energy, and reduces fatigue. The last reason why people become addicted to coffee is that it is available almost everywhere. You can purchase coffee in nearly every restaurant and bakery shop.