Coffee control, look out! Don't drink coffee these days.

Coffee control, look out!

Be awakened by the smell of coffee in the morning, have a refreshing cup in the afternoon, and maybe have a refreshing drink after dinner. Nowadays, coffee is more and more accepted by people. Coffee also has several "legends". Drinking coffee can help you lose weight, help your eyesight, prevent stroke and fight cancer. However, we would like to remind that the mechanism of the effect of caffeine in coffee on the body is very complex, including the regulation of hormone levels and the expression activity of specific genes. Therefore, some people, or some time, are not suitable for drinking coffee. In addition, no matter how good the coffee is, you can't overdo it. in the study, people who drink five cups of coffee a day are defined as heavy coffee drinkers. If they drink too much, they may have the same effect as taking medicine.

Drinking coffee after a good meal makes the esophagus narrow.

Case: a young man is an IT man who often stays up late and works overtime. Over the years, he has formed a habit of having a cup of coffee after supper to refresh his mind.

Not long ago, he was inexplicably thin (from more than 150 jin to more than 130 jin). And swallow things more and more hard, drink cold boiled water to swallow, otherwise it will all spit out. Multiple gastroscopy and imaging examinations were highly suspected of esophageal cancer. Finally, he went to the provincial hospital to prepare for surgery after the diagnosis. But the plot reversed, and the gastroenterologist found that he did not have cancer and was a benign stricture of the esophagus. The normal person's esophagus is generally 2.5 centimeters in diameter, but his esophagus at that time was only about 0.3 centimeters.

The doctor said that his benign stricture of the esophagus was caused by reflux esophagitis, and the habit of drinking coffee after satiety every day was the cause of the disease.

What does coffee have to do with "reflux"?

The caffeine in coffee stimulates the sphincter that should have been closed at the lower end of the esophagus, making it more relaxed, allowing stomach and duodenal contents to return to the esophagus, so that gastric acid, pepsin, bile salt and trypsin damage the esophageal mucosa. cause inflammation, erosion, ulcers.

The IT man's habit of drinking coffee after satiety persisted for a long time, with repeated erosion and ulcers of the esophagus, forming granulation and scar, and finally contracting and causing esophageal stricture.

Drinking coffee on an empty stomach can hurt your stomach

Case: "enjoy a cup of good coffee in the morning light, as if all the cells of the body are awakened." Mandy, 23, who works for an advertising agency, drinks coffee as a ritual. But recently she found that she felt refreshed after a cup of coffee, but her stomach ached vaguely for a long time.

What's wrong with drinking coffee on an empty stomach?

Drinking coffee on an empty stomach will stimulate and excite the sympathetic nerve, which will reduce appetite.

In addition, caffeine is a strong stimulant of gastric acid secretion. When fasting, strong acid stimulates the gastric mucosa, causing discomfort. Those with gastric ulcers or duodenum can aggravate the disease.

Experts from the American University of Health Sciences say that people become sensitive when they drink coffee immediately after getting up. It is recommended to eat some staple foods such as bread before drinking coffee. People with stomach problems should stop drinking.

People with hypertension should drink coffee carefully when they are stressed.

Case: there is a department manager who drinks a cup of coffee after getting up every morning. after working for a few hours, he will drink coffee to refresh himself and relieve stress when he feels bad or stressed at work. When he is in a bad mood, he should also have a cup of coffee to change his mood.

What happens when you drink coffee when you are nervous and stressed?

The study found that even the dose of caffeine in a cup of coffee (140mg) can affect blood pressure, especially under stress. If emotional tension is added at this time, it will have a dangerous multiplication effect.

People who consume too much caffeine, especially those with heart disease, are prone to arrhythmia and cardiovascular disease.

A team of researchers from the Department of Psychology at La Trobe University in Melbourne found that people who were stressed and addicted to coffee were three times more likely to have auditory hallucinations and hallucinations than others. The effect is similar to taking too much caffeine.

The refreshing effect of coffee varies from person to person.

Case: a mother said that her daughter was nervous in her third year of high school, slept less at night, dozed off in class, didn't listen to the class, told me to refresh herself with coffee, and that all the students were drinking.

Refreshing, people will think of coffee first. Scientists dispute the role of caffeine.

An experiment by the Sleep Medicine Research Center of St. Luke's Hospital in the United States found that caffeine is refreshing, but its effect varies from person to person.

An article in the Journal of Neuropsychopharmacology says that drinking coffee doesn't make you more awake, focused or responsive, it just keeps you awake: "I drank coffee and drove across the continent." I knew it would keep me awake. But if I have to write a scientific paper late at night, coffee won't keep me focused or sharp. "

Why do you stay awake?

The reason is that caffeine inhibits the action of a brain chemical called adenosine monophosphate. Usually, adenosine slows down the body's response, and people are excited all the time because caffeine prevents the chemical from getting close to the cells. But the effect of caffeine will pass soon!

Drinking a lot of coffee consumes vitamin B in the body.

After the effect of caffeine is over, people will feel tired due to the continuous impact of a large amount of adenylate on the body. When many friends work overtime, they will keep drinking espresso in order to keep themselves awake. What will be the result?

Drinking a large amount of coffee will speed up the metabolism and consume the vitamin B group related to nerve and muscle coordination in the body, in which vitamin B1 can maintain the balance and stability of the nervous system.

People who lack vitamin B groups tend to get tired, so they drink more coffee and need more and more coffee, but the effect is getting worse and worse, forming a vicious circle and forming the habit of drinking coffee.

Therefore, must stay up late, supplement some vitamin B group, but more effective.

"drinking too much coffee" is a manifestation of medicine.

Case: a sales executive of a foreign-funded enterprise. She was under great pressure to study in high school and often drank coffee to cheer her up. After work, she is under great pressure at work, insomnia at night and lack of energy during the day. She regards coffee as a refreshing "panacea". She got up with a cup of coffee in the morning. At least eight drinks at work, it's still very strong, and one more drink before going to bed at night. The tradition of drinking ten cups a day has been going on for at least a year. One night, I forgot to drink coffee and couldn't sleep.

If you drink too much coffee, you also have troubles. 'The brain doesn't seem to work without coffee now, 'she said. "I forgot my coffee when I was on a business trip. Once I don't drink it, I will feel uncomfortable and feel as if I have caught a cold."

An article published in the Journal of Neuropsychopharmacology says that drinking coffee all the time is actually a sign of drug dependence.

"people who regularly consume caffeine will eventually become dependent on it, and if you keep them away from caffeine, their performance will be lower than normal."

Studies have shown that continuous caffeine intake reduces the production of norepinephrine, a mood-boosting hormone in the brain, causing the body to pursue caffeine, a substance that is both fulfilling and empty.

Caffeine has a stronger effect on men.

Case: we have colleagues who can drink six cups of coffee a day without worry, and friends who have a cappuccino after dinner and then sleep like a baby within an hour.

Case: there was a senior high school student who always studied late at night, so the first thing she did when she got up was to make coffee. She felt refreshed after drinking it, but she had acne, which was very severe. But for the college entrance examination, she still takes getting up in the morning to make coffee as her first lesson.

Why does coffee have such a different effect on everyone?

The study found that the body's chemical process of processing caffeine changes based on several key factors--

The brain's sensitivity to caffeine is related to the amount of caffeine and adrenoceptor binding. People who can effectively bind to more adrenoceptors tend to be more sensitive to coffee.

There is an enzyme in the liver that helps the body metabolize caffeine. Those who produce fewer metabolic enzymes spend more time clearing caffeine from the body, which lasts longer and has more lasting side effects.

There are also gender differences in the body's ability to handle caffeine, and women are born to metabolize faster than men. As a result, caffeine has a stronger effect on men.