Caffeine

Your energy level isn't the only thing that gets a boost after downing an energy drink.

Can people really get "addicted" to caffeine? Can people die from a caffeine overdose? Here are the facts about the world's most popular mood-altering drug.

Perk up! Here's more evidence that coffee is safe for your heart.

Teens who drink energy drinks a lot are more likely to get head injuries than those who don't consume the highly caffeinated beverages, a new study from Canada suggests.

Drinking a cup of coffee at night may be bad for sleep in more ways than one: Caffeine not only keeps you alert but also affects the body's internal clock.

Caffeine is in coffee, tea and other products that we consume every day, so why is the powdered form dangerous?

An infographic that breaks down what happens to in your body after you drinking just one soda has gone viral, but health experts say some information in the graphic is exaggerated.

Energy drinks might prime you for heart problems, a new study finds.

People who drink four cups of joe daily have a lower risk of developing the debilitating disease multiple sclerosis (MS), researchers say.

Energy drinks may be to blame in the case of an otherwise healthy 26-year-old man who had a heart attack, according to a new case report.