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 ...

Caffeine is a common feature of many sodas, coffee, and food products. It’s a drug that is made naturally in the leaves and seeds of many plants and gives an energy boost when consumed. But how long ...

Caffeine increases brain activity, focus, and cognition while countering exhaustion. Common signs of a caffeine crash include headaches, tiredness, difficulty concentrating, and irritability. This can ...