It is often said that drinking coffee is a refreshing drink. But who knows if drinking too much is h

I know, but if you can't help it, it's okay to drink a little refreshment.

Why is it that drinking coffee for a refreshing but not effective for some people?

This problem has been bothering me for a long time, for me coffee is not effective, but when I want to sleep, I will make a cup of coffee, not only will not affect my sleep, but will sleep faster. Caffeine is a pick-me-up because it disables the sleepiness regulatory switch in the brain. There is a receptor in the brain that makes the brain feel sleepy, and this receptor is regulated by "adenosine", and when adenosine binds to it, a person feels sleepy.

Caffeine is structurally similar to adenosine, so the receptor that controls drowsiness also binds to caffeine; This "wrong combination" doesn't make the brain feel sleepy, so people don't want to sleep.

1. Is drinking coffee for a long time good for the body?

Caffeine is a central nervous system stimulant, and in addition to **, most people can stay awake and refresh when they drink coffee. When consumed for a long time*** includes: insomnia, rapid heartbeat, stomach upset, increased blood pressure, migraines, nervousness, anxiety, tinnitus, muscle tics, frequent urination, dehydration, calcium loss, etc.

Sensitive people can experience even a small cup or two of coffee. Long-term coffee consumption may cause tolerance and even dependence, and if you suddenly stop consuming caffeine, you may experience withdrawal symptoms such as severe headaches, muscle pain, depression, irritability, and constipation. <>

2. Who is not suitable for coffee?

Use caffeinated beverages with caution in the following situations: insomnia; gastric discomfort such as gastric ulcer, gastroesophageal reflux, heartburn, flatulence, etc.; diarrhoea and irritable bowel syndrome; Glaucoma patients, hypertensive patients; Patients with heart disease. <>

3. Summary.

There are benefits to drinking coffee regularly and in moderation. Drinking coffee can alleviate depression, protect the brain, and prevent Alzheimer's disease. Coffee contains a lot of energy, enhances physical fitness, can enhance metabolic function, eliminate fatigue, promote sleep and rest, can improve memory, and enhance brain power.

Drinking coffee can be appetizing, increase appetite, eliminate food accumulation, strengthen muscles and bones, and protect the heart. However, not drinking a large amount of coffee at one time can lead to insomnia, even caffeine poisoning, and in severe cases, death. <

The main reason is that some people metabolize caffeine very slowly, so it has no effect on some people. Drinking coffee for a long time is good for the body.

Because some people are immune to caffeine, drinking coffee for a long time is definitely not good for the body, which will lead to endocrine system disorders.

Mainly because some people are resistant to coffee. Drinking coffee for a long time is not good for the body, which will damage the body.

Coffee may make you insomnia at night and may also raise your blood pressure. However, Professor Martin, director of the Coffee Research Institute at Vanderbilt University in the United States, said a few days ago that coffee contains hundreds of health-promoting ingredients that can resist liver damage, various cancers, asthma, heart disease and paralysis tremens. He points out that drinking 2-4 cups of coffee a day is beneficial.

People who don't drink coffee are more likely to develop these diseases than coffee drinkers. Nearly 20 years of research have confirmed that caffeine is the active ingredient in coffee, it activates the central nervous system, and can be used to make long-acting analgesic drugs that can fight drowsiness, colds and flu, asthma and edema. It is easy to become addicted to insomnia, nervousness and increased blood pressure.

Studies have shown that coffee contains anti-dementia substances that reduce the effects of harmful substances on the body and help prevent some diseases. Scientists say that when oxygen in the human body is mixed with other chemicals, harmful substances are formed that blindly destroy cells and body tissues, which is the cause of heart disease, vascular disease, tumors, weakened immune mechanisms, and neurasthenia. According to the results of the American Coffee Research Institute, coffee contains 4 times more anti-dementia substances than tea.

Nutrition plays a major role in strengthening the body's disease prevention mechanisms, including vitamin E, vitamin C, carotene from soybeans, red wine, certain seasonings, fruits, onions and olives. Roasted coffee beans are more resistant to dementia, and the substance is not weakened or destroyed in decaffeinated coffee. At the same time, experts point out that drinking a cup of coffee after waking up in the morning can refresh the mind, and taking a sip of coffee during the day at work can be refreshing.

Therefore, the coffee can be slightly stronger at this time. Coffee should be slightly light after a meal or in the evening. Coffee is recognized as a healthy drink, but coffee should be drunk for a certain amount of time, at the right time.

Coffee or tea is not suitable for drinking with meals and should be consumed after meals. When drinking coffee, you should drink some plain water, whether hot or cold. This is done to remove bad breath for better taste; Second, due to the diuretic function of coffee, drinking more plain water can increase urine output and protect kidney function, and at the same time, there is no need to worry about drinking coffee will "catch fire".

Drinking coffee is an important factor in the onset of irregular heartbeats, and the heart, which is the center of the body that controls blood output, is susceptible to caffeine. Therefore, it has been pointed out that coffee increases the incidence of heart disease. The reasons for this are:

Caffeine can cause blood pressure to rise. However, the effects of caffeine on the heart do not prove that coffee consumption increases the incidence of heart disease, on the contrary, coffee consumption reduces the risk of stroke and heart disease. Scientific studies have shown that coffee can boost blood pressure, but the increase in blood pressure is very short-lived, and over time, this boosting effect disappears naturally.

In addition, because coffee contains a lot of flavonoid antioxidant active ingredients, drinking coffee reduces the risk of stroke and heart disease.

In addition, coffee also contains a large number of bioactive polyphenols, most of which are chlorogenic acids, whose main effects include inhibiting fat absorption, reducing blood sugar concentration, and promoting the decomposition of triglycerides in adipose tissue. Follow-up studies have found that drinking 1 cup of coffee per day also reduces the risk of premature death, including death from cardiovascular disease, by 12%.

It is definitely harmful, and it is dependent on drinking it for a long time, so it is not recommended to drink it often.

As long as you don't drink too much, don't drink more than two cups a day, and don't drink coffee at night.