Benefits: 1. Coffee contains certain nutrients. Coffee's niacin contains vitamin B, and the content is higher in roasted coffee beans. And there are free fatty acids, caffeine, tannins, etc. 2. Coffee is good for the skin. Coffee can promote metabolic function, activate digestive organs, and is very effective in treating constipation. Taking a bath with coffee powder is a kind of warm therapy and has the effect of losing weight. 3. Coffee has the function of relieving hangover. Drinking coffee after drinking alcohol will rapidly oxidize acetaldehyde converted from alcohol, decompose it into water and carbon dioxide and be excreted from the body. 4. Coffee can eliminate fatigue. To eliminate fatigue, it is necessary to supplement nutrition, rest and sleep, and promote metabolic functions, and coffee has these functions. 5. Three cups of coffee a day can prevent gallstones. Caffeinated coffee can stimulate the contraction of the gallbladder and reduce the cholesterol in the bile that easily forms gallstones. Recently, researchers from Harvard University in the United States found that men who drink two to three cups of coffee a day have a lower than 40% chance of developing gallstones. 6. Regular drinking of coffee can prevent radiation damage. Radiation damage, especially radiation from electrical appliances, has become a more prominent form of pollution. Indian atomic researchers reached this conclusion in experiments on mice and said it can be applied to humans. 7. The health and medical functions of coffee. Coffee has the functions of antioxidant and heart protection, strengthening muscles and bones, benefiting the waist and knees, stimulating appetite and promoting food intake, eliminating cellulite and accumulation, promoting orifices and dehumidification, activating blood circulation and removing blood stasis, calming wind and relieving spasm. 8. The impact of coffee on mood. Experiments show that the average person absorbs 300 mg of caffeine a day (about 3 cups of brewed coffee), which will have a good impact on a person's alertness and mood. Disadvantages: 1. Adds confusion when you are nervous. Caffeine helps improve alertness, sensitivity, memory and concentration. But drinking more coffee than you are used to will produce the same dose of stimulants that can cause jitteriness. For people prone to anxiety disorders, caffeine can worsen symptoms such as sweaty palms, heart palpitations, and tinnitus. 2. Exacerbating high blood pressure Because of its own analgesic effect, caffeine is often compounded with other simple analgesics. However, if you take it in large amounts for a long time, if you already have high blood pressure, using a large amount of caffeine will only make your condition worse. For serious. Because caffeine alone can increase blood pressure, and if coupled with emotional stress, it will have a dangerous multiplicative effect. Therefore, people at risk of high blood pressure should especially avoid drinking caffeinated drinks when they are under high work pressure. . Some people who have the habit of drinking coffee all year round think that they are immune to the effects of caffeine. However, this is not the case. A study shows that after drinking a cup of coffee, blood pressure can increase for up to 12 hours. 3. Inducing osteoporosis Caffeine itself has a good diuretic effect. If you drink coffee in large amounts for a long time, it will easily cause bone loss and have an adverse effect on the preservation of bone mass. For women, it may increase bone mass. Loose threats. But the premise is that people who usually lack enough calcium in their food, or people who don’t move often, plus postmenopausal women, lose calcium due to lack of estrogen. The above conditions are combined with a large amount of caffeine. , may pose a threat to the bone. If you can enjoy it in reasonable amounts, you can still avoid eating due to choking. In addition, the following six types of people should not drink coffee: People suffering from high blood pressure, coronary heart disease, arteriosclerosis and other diseases - long-term or large amounts of coffee drinking can cause cardiovascular diseases. Older women - Coffee can reduce calcium and cause osteoporosis. After menopause, women need ten times more calcium every day. Stomach ailments – Drinking too much coffee can worsen stomach ailments. Pregnant women - drinking too much coffee can cause fetal malformations or miscarriage. People who are deficient in vitamin B1 - Vitamin B1 can maintain the balance and stability of the nervous system, but coffee has a damaging effect on it. Cancer patients--drinking excessive amounts of coffee poses a risk of cancer to normal people.