1. Coffee contains certain nutrients. Nicotinic acid in coffee contains vitamin B, and the content of roasted coffee beans is higher. And there are free fatty acids, caffeine, tannic acid and so on. 2. Coffee is good for the skin. Coffee can promote metabolic function, activate digestive organs, and has great effect on constipation. Taking a bath with coffee powder is a kind of thermotherapy, which has the effect of losing weight. 3. Coffee has the function of hangover. Drinking coffee after drinking will quickly oxidize acetaldehyde converted from alcohol, decompose it into water and carbon dioxide and excrete it. 4. Coffee can relieve fatigue. To eliminate fatigue, we must supplement nutrition, rest and sleep, and promote metabolic functions, and coffee has these functions. 5. Three cups of coffee a day can prevent gallstones. For caffeinated coffee, it can stimulate gallbladder contraction and reduce cholesterol that is easy to form gallstones in bile. Recently, researchers at Harvard University in the United States found that men who drink two or three cups of coffee a day have a lower chance of getting gallstones than 40%. 6. Drinking coffee often can prevent radiation injury. Radiation damage, especially the radiation of electrical appliances, has become a prominent pollution at present. Indian atomic researchers in Baba got this conclusion in mouse experiments and said it can be applied to humans. 7. The health care function of coffee. Coffee has the functions of resisting oxidation, protecting heart, strengthening bones and muscles, benefiting waist and knees, stimulating appetite, promoting food intake, eliminating fat and food stagnation, inducing resuscitation and removing dampness, promoting blood circulation and removing blood stasis, calming wind and stopping spasm. 8. The influence of coffee on mood. Experiments show that the average person absorbs 300 milligrams (about 3 cups of brewed coffee) a day, which will have a good influence on a person's alertness and mood. The following six kinds of people should not drink coffee: suffering from hypertension, coronary heart disease, arteriosclerosis and other diseases-drinking coffee for a long time or in large quantities can cause cardiovascular diseases. Older women-coffee will reduce calcium and cause osteoporosis. After menopause, women need to add ten times the amount of calcium every day. Patients with stomach trouble-drinking too much coffee can make stomach trouble worse. Pregnant women-drinking too much coffee can lead to fetal malformation or miscarriage. Vitamin B 1 deficiency-vitamin B 1 can maintain the balance and stability of the nervous system, and coffee can destroy it. Cancer patients-drinking too much coffee is dangerous to normal people. Because coffee stimulates the brain so strongly that it directly affects the mental state, when coffee was first introduced to Europe in the 16th century, it was argued that coffee could only be drunk with a doctor's prescription. In the past four or five centuries, with the vigorous development of coffee culture, people can't live without coffee for a day, but the medical profession has put forward one after another that the influence of coffee on human body is not only refreshing. Let's talk about the refreshing effect of coffee first. According to the research, drinking100-200mg of caffeine every day is enough to refresh the mind and is harmless to the body. As far as office workers are concerned, the best time to drink coffee is after breakfast in the morning, when they first arrive at the office, and after lunch break, when they are ready to start their busy work in the afternoon. At this time, a cup of coffee can avoid the usual drowsiness after a meal. The study also found that, as far as the average person is concerned, a cup of coffee in the morning and afternoon has the best refreshing effect. If it exceeds this amount, it will not only fail to achieve the refreshing effect, but also make people feel restless. Drinking too much coffee will also lead to the loss of calcium, which is a big threat to the elderly, especially middle-aged and elderly women. Two or more cups of coffee a day will increase the probability of fracture by about 50%, which is shocking. Experts believe that it is safest for the elderly to drink coffee once a day. There may be something you don't know about the benefits and disadvantages of coffee: filtered coffee will not increase cholesterol, while drinking coffee will increase LDl bad cholesterol a little, but it will also increase HDL good cholesterol. Coffee can stimulate defecation for about one third of healthy people. Occasionally, when defecation is not smooth, drinking a cup of espresso will have an unexpected laxative effect. Coffee can reduce the incidence of Parkinson's disease. Drinking coffee during diarrhea, the diuretic effect of coffee, will promote the discharge of water in the body and aggravate diarrhea. Coffee can stimulate gallbladder contraction, and people with gallstone tendency are forbidden to drink coffee. Drinking too much coffee can easily lead to spontaneous abortion in pregnant women. Caffeine in coffee can inhibit asthma. When asthma attacks, patients can be given two cups of strong coffee in an emergency, because coffee has the effect of bronchial drugs. People who drink coffee often have less asthma. Coffee can also eliminate depression and improve sexual desire. Coffee is really a wonderful food, but how to benefit from it and avoid its harm depends on your physical condition and weight!