Pros and cons of coffee: 1. Coffee contains certain nutrients. The nicotinic acid of coffee contains vitamin B. Roasted coffee beans contain more. And there are free fatty acids, caffeine, tannins and so on. 2. Coffee is good for the skin. Coffee can promote metabolic function, vitalize the digestive organs, and is very effective for constipation. Bathing with coffee powder is a kind of warm therapy and has the effect of weight loss. Drinking a cup of coffee after meals also helps digestion. 3. Coffee has the function of relieving alcohol. Drinking coffee after drinking alcohol will make the acetaldehyde transformed from alcohol oxidize quickly, decompose into water and carbon dioxide and be discharged out of the body. 4. Coffee can eliminate fatigue. To eliminate fatigue, it is necessary to supplement nutrition, rest and sleep, and promote metabolic function, and coffee has these functions. 5. Three cups of coffee a day can prevent gallstones. For caffeine-containing coffee, can stimulate the gallbladder contraction, and reduce the cholesterol in the bile is easy to form gallstones, the latest U.S. researchers at Harvard University found that men who drink two to three cups of coffee a day, the chances of getting gallstones is less than 40%. 6. Drinking coffee can prevent radiation damage. Radiation damage, especially radiation from electrical appliances has become a more prominent form of pollution. India Ba Ba atomic researchers in the rat experiment to get this conclusion, and said that can be applied to human beings. 7. Health care medical function of coffee. Coffee has antioxidant and cardioprotective, strong muscles and bones, lumbar and knee, appetizing and promote food, fat elimination and elimination of stagnation, sharp and dehumidification, blood dredging, resting the wind spasm and other effects. 8. The influence of coffee on mood. Experiments have shown that the average person a day to absorb 300 mg (about 3 cups of brewed coffee) of caffeine, a person's alertness and mood will bring a good influence. The following six kinds of people should not drink coffee: Suffering from hypertension, coronary heart disease, atherosclerosis and other diseases - long-term or large amounts of coffee consumption can cause cardiovascular disease. Elderly women - coffee can reduce calcium and cause osteoporosis. After menopause, women need to add ten times the amount of calcium per day. People with stomach problems - drinking too much coffee can cause stomach problems to worsen. Pregnant women - Drinking too much coffee can lead to fetal malformation or miscarriage. Vitamin B1 deficient people - Vitamin B1 can maintain the balance and stability of the nervous system, and coffee has a destructive effect on it. Cancer patients - Drinking too much coffee poses a cancer risk to normal people. Because coffee stimulates the brain too strongly, directly affecting the mental state, in the sixteenth century when coffee was first introduced to Europe, there were people who advocated that you must have a doctor's prescription to drink coffee. And four or five centuries, the coffee culture has flourished, so that people have been unable to one day without coffee, but the medical profession has been put forward, the impact of coffee on the human body, but also not only refreshing only. First of all, the refreshing effect of coffee. According to research, drinking 100-200 mg of caffeine a day is enough to refresh, and is harmless to the body; and the best time to drink coffee, as far as office workers are concerned, is early in the morning after breakfast, just arrived at the office, as well as after the lunch break, ready to start the afternoon busy work. A cup of coffee at this time can eliminate the usual drowsiness after meals. Studies have also found that, for the average person, a cup of coffee in the morning and a cup of coffee in the afternoon has the best refreshing effect, more than this amount, not only can not achieve the effect of refreshing, but also make people feel agitated. Drinking too much coffee can also lead to calcium loss, for the elderly, especially middle-aged and elderly women, is a major threat to osteoporosis. Two or more cups of coffee a day will increase the chance of fracture by about 50%, which is alarming. Experts believe that it is safest for elderly people to drink coffee one cup a day. There may be a few more things you didn't know about the good and bad effects of coffee on the human body: filtered coffee is less likely to increase cholesterol, and while drinking coffee slightly increases LDl bad cholesterol, it likewise increases HDL good cholesterol. Coffee has a stimulating effect on bowel movements in about one-third of healthy people. Drinking a cup of strong coffee when you have an occasional bad bowel movement can have an unexpected laxative effect. Coffee may reduce the incidence of Parkinson's disease. Drinking coffee when you have diarrhea, the diuretic effect of coffee will promote the discharge of water in the body and aggravate diarrhea. Coffee will stimulate the gallbladder contraction, people who have a tendency to gallstones are strictly prohibited from drinking coffee. Drinking too much coffee can lead to spontaneous abortion in pregnant women. Caffeine in coffee can inhibit asthma. When an asthma attack, you can give the patient two cups of strong coffee in an emergency, because coffee has the effect of bronchial drugs. Regular coffee drinkers have less asthma. Coffee can also eliminate depression and increase libido. Coffee is really wonderful food, but how to avoid its harm, depending on your physical condition and portion of the pinch!