In experiments with rats, the researchers found that caffeine has a significant impact on the mesolimbic dopamine pathway, an important part of the brain's reward system, through which dopamine is ...

Scientists have recently discovered that caffeine may counteract some of alcohol’s effects on the brain’s reward system, particularly by blocking certain dopamine responses typically triggered ...

An curved arrow pointing right. Coffee, Red Bull, whatever. We drink it for energy, but is that really what it gives us? More from Science Coffee, Red Bull, whatever. We drink it for energy, but ...

It seems that caffeine may slightly boost the speed of physical movements – but it turns out that its effects on the brain are not what you might have thought. All our results were in line with ...

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 ...

By blocking adenosine’s relaxing effects, caffeine lets dopamine and glutamine, another natural stimulant produced by your brain, run wild, making you more alert, less bored, and providing a ...

Downing more than 600mg a day ( the equivalent of six mugs of brewed coffee) can produce anxiety, sleeplessness, agitation, ...

Only one study into the effects of caffeine is active at the moment and is due to end in 2024. Research looks at how caffeine acts on the brain to help understand if there really is a connection ...

The chemical "stimulates the brain and central nervous system ... which just means we require more caffeine to feel the same effects," registered dietician Jordan Hill told USA Today.

Daily consumption of 200-300 mg of caffeine is usually safe. More than 300 mg of caffeine could have negative effects on the body, such as restlessness, anxiety, irritability, muscle tremors, ...

Caffeine appears in so many foods ... Oliver Grundmann, who studies how plants affect the brain at the University of Florida. It can also increase dopamine signaling in the brain.