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 ...

The amount of caffeine that’s safe to consume differs for everyone based on age, weight, and overall health. That said, you shouldn’t consume more than 400 milligrams per day. Caffeine is a stimulant ...

If you’re like most adults, you probably enjoy a cup of coffee or tea now and again. These drinks are natural sources of caffeine, the most commonly used stimulant in the world (1). Although commonly ...

Because caffeine is water and fat soluble, it’s able to exert its affects on many parts of the body. andrew crotty/ Shutterstock It’s recommended that adults consume no more than 400mg of caffeine a ...