Is drinking coffee really refreshing? The reason why drinking coffee is not refreshing Coffee and Health

Is drinking coffee really refreshing?

There is a joke that said that the foolish Duke moved away from the mountain and angered the Jade Emperor. The Jade Emperor sent two immortals to sit on the Taihang and Wangwu er mountains, but the foolish Duke tried his best to remove them, so he turned to the wise old man for help. The wise old man took out a treasure and shook it a little, and the two gods were raised to the air. The wise old man asked what treasure it was, and the wise old man said, "this is coffee, which can refresh you." Jokes are jokes, but coffee is a pick-me-up phrase widely recommended by coffee sellers, such as "coffee in the morning, spirit in the morning", but there are always some people who should fall asleep even after drinking a few cups of coffee. Why?

As for the reason why coffee is refreshing, scientists have explained that caffeine in coffee can stimulate the body's nervous system and make it more sensitive. Researchers at the Osaka Institute of Life Sciences have further found that after people have drunk coffee or black tea, caffeine binds to a receptor protein called adenosine A2A on the brain cell membrane. They studied mice and found that mice who drank more coffee slept significantly less than those who drank no or less coffee.

But British scientists don't think so. researchers at the University of East London conducted an experiment in which they recruited 88 volunteers who drank more than two cups of coffee a day and divided them into two groups. one group told them to drink decaf coffee, which was actually given them regular coffee, while the other group told them to drink regular coffee but served decaf coffee. Then both groups were asked to test their attention and response. if caffeine really increases attention and response, that is, it makes people feel more energetic, then the second group should do better than the first group, but the real result is just the opposite. the score of the first group is better than that of the second group. Scientists believe that what really works is not caffeine, but the psychological cues they get from coffee, that is, they think caffeine will make them feel better, whether it's real or not.

There are two very different conclusions in the study of caffeine. Some scientists have put forward a compromise explanation, that is, caffeine does reduce people's need for sleep, but it does not mean that it can improve people's efficiency at work, that is, attention and resilience. It is also right to think about it. After all, "awake" and "spirit" are two different concepts that can exist at the same time. Of course, if you like coffee very much, there is also some good news for you. Studies have shown that a variety of substances rich in coffee are good for immunity, which is not as good as ordinary drugs, but at least it can be regarded as a supplement. In addition, in a British study of more than 100 people, scientists found that coffee also helps to improve people's memory. Dr Michael Asa, of the University of California, Irvine, said: "We know that caffeine can enhance cognitive ability, but no research has shown that caffeine can improve memory. This study shows that caffeine can help slow forgetting within 24 hours. The similar images used in the study required subjects to have better memory and discrimination, which also highlighted the effect of caffeine on memory enhancement. "

As a beverage with a long history, numerous studies have shown that as long as it is not excessive, coffee is still a good drink, please rest assured to drink, if you drink it and then imply that "I will be very refreshed today", then it can also refresh you.

Article source: tadpole radio spectrum