We all know this person – do not speak to them until they have had a cup of coffee or an energy drink. Hot chocolate just won't do the trick. They will not be nice. They will not be alert. Proceed ...

Caffeine is a naturally occurring stimulant often found in coffee, tea, chocolate and various energy drinks and medications.

When you cut out caffeine, you'll miss out on the temporary spike in blood pressure people often get from caffeine. However, the exact impact of cutting out caffeine can depend on your caffeine ...

For most people, consuming some caffeine is harmless — but too much can be dangerous. Recent news coverage has raised questions about the amount of caffeine in some popular drinks and what consumers ...

By Vijay Kumar Malesu A controlled human study reveals that coffee’s complex chemical matrix may shape immune responses ...

Could coffee help to counteract some of the effects of alcohol on the brain, and potentially limit the risk of addiction? That's what's suggested by a new study of how caffeine interacts with the ...

Some claim it gives you energy and focus—without the jitters and crash.

Learn how caffeine affects brain chemicals and health, sleep, and mood. Understand safe daily limits, hidden sources, and signs you’re getting too much.

Can you get the same energy boost without caffeine in your cup? The answer may surprise you.

Drinking coffee at the right time can help prevent overstimulation, digestive issues and jitterness.

A cup of coffee or tea in the morning or an afternoon caffeine pick-me-up is usually fine for most adults. But parents might want to take a closer look at caffeine and other ingredients in the drinks ...