When it comes to coffee, people think of caffeine, which is a mild stimulant in coffee. It can improve the sensitivity and attention of human body, accelerate the metabolism of human body, and improve the mental state and physical quality of human body. At present, caffeine has been found in about 60 kinds of plants, of which tea and coffee are the most well known. What kind of people are not suitable for drinking coffee? Coffee contains caffeine, and whether it reacts to caffeine varies from person to person. For example, some people are allergic to pollen, while others are not suitable for eating seafood. And these two situations, for most people like you and me, will not have any impact. As for how much coffee to drink every day, in some coffee-consuming countries, people consume about 250-600 milligrams of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body. So you can drink 4- 10 cups of instant coffee every day. What effect does drinking coffee have on health? Your main concern is whether the caffeine contained in coffee has an impact on health. In fact, caffeine is a mild stimulant in coffee, which can improve human sensitivity and attention, accelerate human metabolism, and improve human mental state and physical quality. At present, caffeine has been found in about 60 kinds of plants, of which tea and coffee are the most well known. In some coffee-consuming countries, people consume about 250-600 milligrams of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body. How much coffee do you drink every day? People often ask, how much coffee is excessive? In some coffee-consuming countries, people consume about 250 to 600 milligrams of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body. Because the caffeine content in a cup of coffee (150ml) is generally:-ground coffee: about 80-90ml- instant coffee: about 60ml In some coffee consuming countries, people consume about 250-600mg of caffeine every day on average. After repeated scientific research and analysis, this dose has no side effects on human body. The caffeine content of a cup of instant coffee (about 150 ml) is generally about 60 mg, so drinking 4- 10 cups of instant coffee every day will not be excessive. Coffee, alcohol or tobacco can make people feel intoxicated and excited, and caffeine can also make people feel excited. Caffeine can stimulate the central nervous system or muscles, restore muscles or fatigue, improve work efficiency, have a sober effect, and make the brain more active and sensitive. On the other hand, it can also improve heart function, dilate blood vessels, have good blood circulation, have a calm headache and feel comfortable. And asthma can inhibit the excitement of parasympathetic nerve by stimulating sympathetic nerve. Other coffee also helps digestion, especially when eating too much meat, which can promote digestion and prevent gastroptosis. Because caffeine can break down fat, westerners must want to drink coffee after eating energy-enhancing food. Caffeine can not eliminate garlic flavor, but also contains betel nut, so coffee is an indispensable drink after taste compensation cooking. In addition, coffee also has a deodorizing effect. Residues brewed with ground coffee can be dried in containers and used as deodorizers in refrigerators or shoe boxes. Sprinkling on the ashtray can also eliminate the smell of tobacco. And coffee can also be used to hide the taste. For example, instant coffee can be turned into a sweet and delicious meat dish if it is melted with boiling water and its taste is stained with meat. Coffee contains a lot of caffeine, will it affect your health? Maybe some people will have such concerns. However, the amount of two or three cups of coffee is no problem. On the contrary, drinking coffee in moderation is effective for the body. Understand coffee correctly, so that everyone can drink coffee happily and enjoy coffee time! The influence of coffee on people's emotions Recently, Professor A.P.Smith of the University of Bristol in England published his ten-year report, which studied the influence of coffee on the brain nerves, especially the influence of coffee on cognitive ability and emotions. Their discrimination and alertness were measured 30 minutes before and after drinking coffee. Smith found that after drinking a cup of coffee, they became more alert and more focused. Professor Smith said that coffee can really refresh you, especially when you don't get enough sleep. If you have a cold and have to concentrate on going to work or coping with exams during the day, drinking a cup of coffee will definitely promote your alertness and help you tide over the difficulties. Coffee will stay in the body for 2 to 5 hours, so coffee has a long-term refreshing effect. Further experiments show that the average person can absorb 300 mg (about three cups of brewed coffee) of caffeine every day, which will have the following effects on a person's alertness and mood. But when caffeine exceeds 400 mg (four cups), it will bring side effects, such as bad mood, irritability, aggression and trouble. If you only want to take polyphenols in coffee to resist oxidation, you only need to go to "fdecaf" coffee! Studies have found that people who drink coffee are less likely to get Parkinson's disease. Scientists at the Veterans Management Medical Center in Honolulu, Hawaii, found that people who don't drink coffee are five times more likely to develop Parkinson's disease than those who drink more than five cups of coffee a day. Researchers have followed more than 8,000 men for 30 years, and their findings have been published in the Journal of the American Medical Association. Parkinson's disease (PD) is an senile disease with six kinds of pathological changes in the nervous system. Its typical symptoms include tremor, stiffness and decreased voluntary activities of limbs. It is not clear why researchers may reduce the risk of Parkinson's disease by drinking coffee. But they speculate that caffeine contained in coffee may play a role in preventing nerve cells that cause Parkinson's disease from being damaged. Scientists point out that their current results are preliminary and need further research to confirm. They stressed that it is too early to suggest drinking coffee as a treatment for Parkinson's disease. Coffee for preventing gallstones and delicious coffee are refreshing drinks. The latest research also found that every few cups of coffee can prevent gallstones. According to the latest issue of the Journal of the American Medical Association, researchers at Harvard University in the United States found that men who drink two or three cups of coffee are 40% less likely to have gallstones than men who don't drink coffee. If they drink more than four cups of coffee every day, the chance of gallstones will drop to 45%. However, decaffeinated coffee has no such effect. Only caffeinated coffee can stimulate gallbladder contraction and reduce cholesterol which is easy to form gallstones in bile. Other drinks, such as tea and cola, also contain caffeine. Because the caffeine content is lower than that of coffee, the same effect cannot be achieved. Antioxidant and heart-protecting effects of coffee The polyphenols contained in coffee not only refresh the mind, but also have antioxidant effects and cardiovascular protection. Recently, the food chemistry seminar of the annual meeting of the American Chemical Society did have new scientific evidence to prove that coffee contains powerful antioxidants and has the function of protecting the heart and blood vessels. The study was conducted by Scranton University in Pennsylvania, USA. These polyphenols, sometimes called flavonoids, are powerful antioxidants that can resist oxidation and coagulate blood. Coffee and radiation protection have become a prominent pollution and harm at present. Especially the radiation of household appliances: for example, people who operate the phone for a long time, microwave ovens and televisions at home. Especially for pregnant women, radiation has affected the health of the next generation. Reports in this regard are not uncommon. Indian scientists have found that coffee can protect laboratory mice from radiation damage and may have the same effect on humans. Researchers at the Baba Atomic Research Center in India found that 70% of the experimental mice injected with caffeine survived after 25 days after receiving high-dose radiation, which is usually fatal, while all the experimental mice that were not injected died. Kaye Bilgio, who led the study, said that this discovery may also apply to humans. He said: "Studies show that coffee may help prevent injuries." Can coffee cause calcium loss? In recent years, people in China have paid more and more attention to calcium loss and osteoporosis, and they are puzzled by coffee. As for the relationship between caffeine intake and osteoporosis, it is still under continuous study. At present, there is no direct evidence that caffeine can cause osteoporosis, but some studies have pointed out that caffeine can increase calcium excretion. Therefore, it is suggested that people who love coffee eat more high-calcium foods to supplement calcium, such as preparing cheese slices or cheesecakes with coffee, which can not only supplement calcium, but also make coffee more delicious. Those people are not fit for coffee? Patients with cerebral hemangioma are not suitable for drinking coffee, and patients with heart disease should drink coffee without or with low caffeine, because caffeine will accelerate the heart rate and cause cardiac hypoxia. In addition, patients with skin diseases and stomach diseases should drink less coffee as far as possible to avoid aggravating their illness due to excessive drinking. Diabetic patients should also avoid drinking coffee with too much polysaccharide, so as not to aggravate the condition. The US Food and Drug Administration (Fda) issued a statement advising pregnant or potential pregnant women to reduce caffeine intake. Because pregnant women metabolize caffeine about twice as fast as non-pregnant people in the second and third trimester, and caffeine will also enter the fetus through the placenta and flow into the baby through breastfeeding. In addition, many studies have failed to prove that moderate caffeine will have adverse effects on the fetus, and there is no medical report prohibiting pregnant women from drinking coffee. Pregnant women and breast-feeding women are still advised to be more cautious about caffeine intake. In short, if you find yourself unwell after drinking coffee, you should stop drinking coffee for a while, and then start from a small amount and change your drinking style. Coffee is a beauty killer? So far, no research results show that caffeine in coffee is harmful to beauty. On the contrary, moderate caffeine can accelerate metabolism, promote digestion, improve constipation and improve rough skin.