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.

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

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 ...

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

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

After an analysis of health data from over 131,000 people tracked for up to 43 years, researchers found that drinking coffee ...

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 ...

Your morning cup of java can wake your body up; can caffeine do the same thing for your face? Here’s what dermatologists say.

Were you tossing and turning last night and cursing yourself for the iced caramel macchiato you drank in the late afternoon? Do you worry about the amount of caffeine in a Mountain Dew? Caffeine is ...