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 ...

An average 8–ounce (oz) cup of coffee contains around 80–100 milligrams (mg) of caffeine. However, the caffeine content can vary considerably depending on several factors such as coffee type, brewing ...

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 ...