Caffeine is a psychoactive (mind-altering) drug that affects how you think and feel. It is a stimulant that speeds up your breathing, heart rate, thoughts and actions. It’s found in coffee, tea, chocolate, soft drinks, energy drinks, and other products.
People use caffeine for various reasons. Many of us enjoy the taste of popular caffeinated products such as latte and chocolate. Students sometimes use caffeine tablets to power through long nights at the study table. Shift workers also use caffeine products to help adjust their minds and bodies to odd work hours.