Caffeine is one of the world's most consumed psychostimulants (compounds that stimulate brain activity). It can be found in ...

Regular caffeine intake of 300 to 400 milligrams per day is generally safe but exceeding this can cause cardiovascular issues ...

Learn how caffeine affects Parkinson's disease prevention and treatment. New research uncovers both protective benefits and treatment limitations.

An curved arrow pointing right. Caffeine is the most commonly used psychoactive drug in the world. It's known for that pick-me-up it gives. However, it has several other effects on the human body.

Caffeine is the most widely consumed psychoactive drug in the world. It's in coffee, chocolate, energy drinks, soda and tea. It stimulates your brain and nervous system and may reduce fatigue and ...

Caffeine is known to increase alertness. It works by blocking the effects of adenosine, a brain chemical that makes you feel tired. At the same time, it triggers the release of adrenaline ...

British researchers have identified one long-acting way to give your brain a boost ... of Behavioral Nutrition and Physical Activity. Caffeine is not new to scientific study.

Others have wanted to reduce their reliance on external stimulation or were ... that doesn’t overwrite your brain’s reward system. Of course, caffeine dependency goes beyond biology.