However, to let the brain know that "I am tired", it is necessary to make this substance dock with a specific receptor in the brain, and caffeine in coffee can also bind to this receptor-and block the messenger, which is equivalent to blocking the normal binding of other receptors.
In this way, the brain can't know the signals transmitted by fatigue substances, so it won't feel tired, and it can be carried for 4-6 hours to play a "refreshing" role.
In fact, different people drink coffee for different reasons. First of all, the most important reason is genes. Because of genes, the receptors in everyone's brain are different. Some people's brains can accept caffeine better, and the effect of coffee is especially obvious for these people.
Secondly, the difference caused by age. With the increase of age, there are fewer and fewer receptors in the brain that can dock with caffeine. The receptors in the brain of 60-year-old people are one-third less than those of 20-year-old people, so the influence of coffee on the elderly is often less. Third, differences in diet and living habits will also have a great impact. If you drink a lot of coffee for a long time, your brain will release less and less experience. Because of habit, the function of coffee will be less and less.
Therefore, everyone's reaction to coffee is different.
Extended data:
What can I eat to refresh myself:
1, banana. Bananas are called "high-energy foods", which contain carbohydrates easily absorbed by human body and are rich in potassium. Potassium can help maintain the normal function of human muscles and nerves, but it cannot be stored in the body for a long time. After exercise, potassium will drop to a very low level. Studies have shown that low potassium can cause muscle pain, arrhythmia and slow response. And eating a small amount of bananas can supplement the deficiency of potassium;
2. beans. Iron is the main medium for producing human energy and plays an important role in transporting oxygen to human organs and muscles. Therefore, if the human body lacks iron, it will lead to anemia and make people dizzy. Although liver and lean meat are the best sources of iron, eating some beans, such as red beans, black beans and soybeans, can also supplement iron and effectively improve fatigue and weakness.
3. Tea or tea beverage. The reason why tea can refresh oneself is the same as that of coffee, mainly because caffeine in tea can play an active role in nerves. Drinking a cup of tea when you are sleepy can eliminate the problem of fatigue recovery and refresh your mind.
People's Network-Can drinking coffee really refresh you? If you want to refresh yourself, eat more of these three foods.