Caffeine is the most widely used stimulant in the world. For many of us, a cup of coffee or tea is almost as routine as breathing. It helps us wake up in the morning, beat the afternoon slump, and ...

Soda isn't the healthiest beverage, but it does offer a great energy boost. Most sodas have a good amount of caffeine, but the variety with the most caffeine may surprise you. A 12-ounce can of ...

Suddenly stopping caffeine can cause the brain to go into withdrawal. This happens because caffeine temporarily block receptors, and then when the caffeine is stopped, the brain releases too much of ...

Discover how big of a difference caffeine makes.

Find out more about how coffee — and the caffeine it contains — may impact this genetic heart condition that causes the heart to pump less effectively.

Blood donor at donation with red bouncy ball holding in hand. Caffeine appears to affect the quality of blood donations Blood high in caffeine is more prone to damage during storage The red blood ...