Advantages and disadvantages of coffee: 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. Drinking a cup of coffee after a meal also helps digestion. 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. Older women suffering from hypertension, coronary heart disease, arteriosclerosis and other diseases-drinking coffee for a long time or in large quantities can cause cardiovascular diseases-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.