Caffeine is classified as a drug because it stimulates the central nervous system, raising alertness. Caffeine is popular because of the temporary energy and mood boost it offers. Before caffeine is ...

Caffeine is a stimulant found naturally in beverages like coffee and tea. It’s also added to others, such as energy drinks and soda. Caffeine increases chemicals in your brain that improve mood, ...

Caffeine is a stimulant and the most commonly used drug in the world. Benefits can include increased alertness, energy, and concentration. However, it can also lead to insomnia and headaches. Every ...