Caffeine powders can be dangerous because they are much more potent than typical caffeine-containing beverages.

The findings add to a growing body of evidence linking energy drink consumption with heart problems.

Caffeine may really be a trigger for migraines, but only if you consume a lot of it, a new study suggests.

Getting caffeine out of coffee is an intensive process.

It may sound counterintuitive, but people who are supersensitive to coffee's bitter taste actually drink more of it, a new study finds.

Some diet supplements that contain caffeine claim that the compound helps reduce appetite. Does it?

A new report divides coffee lovers into three groups depending on how their bodies respond to caffeine, but does science really support this conclusion?

Caffeine can perk you up, but exactly how much caffeine should you consume – and when should you take it – to achieve "peak" alertness?

Would you gain 25 hours of energy? Or would the consequences be more severe?

Coffee acts on the same system in the body as marijuana does.