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 ...

Coffee and the caffeine in it can interact with some drugs. Learn more about which drugs you should not take with coffee and when to discuss it with a healthcare provider.

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 ...

The levels of caffeine in your blood could affect the amount of body fat you carry, a factor that in turn could determine ...

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 ...

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 ...

Caffeine is a psychoactive substance widely consumed by kids as it is easy to get, is legal, and is contained within socially acceptable drinks. Children as young as 4 years of age are given ...

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 ...

Green tea contains caffeine and tannins, an antioxidant that can mess with iron absorption. So drinking it at certain times ...