Many people drink coffee to refresh their minds, and some people feel refreshed after drinking coffee; but some people drink coffee but have no effect. Do you know why?
Jiang Kunjun, deputy director of research at Minsheng Hospital, pointed out that when the body is tired, the brain will secrete adenosine, and there are adenosine receptors in the brain. When adenosine is combined with adenosine receptors, it will produce strong drowsiness. Therefore, the more tired you are, the more adenosine will be secreted, and the more you will want to sleep.
The structure of caffeine is similar to that of adenosine,
Each person's brain structure is different, and some people even drink coffee, caffeine cannot bind to adenosine receptors.
Caffeine needs to be metabolized by the liver. Some people are born with strong liver metabolism, and caffeine will be metabolized quickly.
Because caffeine binds to adenosine receptors, it keeps people awake, but consumes a large amount of vitamin B group; in the state of lack of vitamin B in the body, supplementing caffeine can only achieve a short-term effect.
Jiang Kunjun explained that coffee is a diuretic, and vitamin B group is water-soluble. If supplemented at the same time, it will accelerate the excretion of vitamin B group,
It has been circulated on the Internet that because caffeine inhibits the absorption of calcium and iron, people with osteoporosis and iron-deficiency anemia are not suitable for drinking coffee. Jiang Kunjun believes that as long as calcium and iron are properly supplemented, coffee can actually be drunk, but three types of people are really not suitable for drinking coffee:
sufferingPeople with gastroesophageal reflux, gastric ulcer and duodenal ulcer are indeed not suitable for drinking coffee, because caffeine will stimulate the gastrointestinal tract and stimulate the secretion of gastric acid.
Coffee contains cafestol, which can inhibit the liver from decomposing cholesterol. Frequent consumption of coffee in large quantities will cause cholesterol to rise. It is recommended to drink filtered coffee.
Healthy people drinking coffee can reduce the risk of gallstones; however, patients with gallstones often drink coffee, which may cause gallbladder contraction, which will cause pain in the upper right abdomen.
Jiang Kunjun reminded that although coffee can help refresh the mind, it still has side effects; according to the recommendations of the Food and Drug Administration,
◎ Consult an expert / Dr. Jiang Kunjun
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