Caffeine can linger in your system for 10 or more hours, which can impact sleep. Double-shot lattes and cold brews have ...

If you drink decaf, you need to hear this.

If you're feeling anxious and having trouble sleeping, you may be taking in too much caffeine, or you may be a slow metabolizer.

Caffeine can be part of a healthy diet for most people. However, too much may be dangerous for your health. Caffeine before bed can reduce sleep quality and make falling or staying asleep harder.

A genetic study reveals that it is not coffee itself, but how long caffeine remains in the blood, that influences the risk of diabetes.

We all know that midterms can lead to a love-hate relationship with caffeine. Here's your sign to ditch the energy drinks—and ...