He explained that “the theory is that napping helps clear adenosine, a neurotransmitter that promotes sleep and accumulates during wakefulness, from your brain. As caffeine takes effect, it blocks ...

Talking about the thing most often found in drinks like coffee and teas, he explains: "Caffeine keeps you alert by blocking adenosine receptors. Because it shares a similar shape to adenosine, the ...

Talking about the thing most often found in drinks like coffee and teas, he explains: "Caffeine keeps you alert by blocking adenosine receptors. Because it shares a similar shape to adenosine ...

Whilst it's in our system, caffeine works by blocking off adenosine receptors that typically slow nerve activity, thereby keeping us alert and awake. He continued: "People with a fast-metabolising ...

Dr Ahmeda Ali, GP with webdoctor.ie, advises that caffeine stimulates heart-rate, acting as a stimulant by blocking a brain chemical called adenosine, which makes you feel tired. “By blocking ...

The report cited caffeine’s negative health effects in kids under 18, including poor sleep and increased blood pressure. Other experts support the recommendation but said it’s probably OK for ...

In fact, research shows that nearly a quarter of teens have caffeine all or most days of the week. But new guidelines from a nutrition research group say that’s bad news, stressing that teens ...

"Caffeine’s stimulatory effects can significantly delay your ability to fall asleep. By blocking adenosine, caffeine keeps your brain in a state of heightened alertness, even when your body is ...

A nutrition research group has released guidelines which recommends that teens should cut back on caffeine and sugary drinks - the whole way back. According to Food & Wine, a new set of guidelines ...