Benefits: 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. Using coffee powder to take a bath is a kind of warm therapy, which has the effect of weight loss. 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 excrete 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 absorbs 300 milligrams of caffeine a day (about 3 cups of brewed coffee), a good influence on a person's alertness and mood. Caffeine helps to improve alertness, sensitivity, memory and concentration. However, consuming more coffee than you are accustomed to can be similar to consuming the same dose of a stimulant, which can cause nervousness. For people who tend to have anxiety disorders, caffeine can cause sweaty palms, heart palpitations, and tinnitus, which are symptoms that worsen. 2. Exacerbate high blood pressure Caffeine is often compounded with other simple pain relievers because of its own pain relieving effects, but when taken in large quantities over a long period of time, using large amounts of caffeine will only worsen your condition if you already have high blood pressure yourself. Because caffeine alone can raise blood pressure, and when combined with emotional stress, it can have a dangerous multiplying effect, people at risk for high blood pressure should especially avoid caffeinated beverages during stressful times at work. Some people who have the habit of drinking coffee all year round think that they are already immune to the effects of caffeine, however, this is not the case, a study shows that after a cup of coffee, blood pressure can rise for up to 12 hours. 3. induced osteoporosis Caffeine itself has a very good diuretic effect, if long-term and large amounts of coffee, easy to cause bone loss, the preservation of bone mass will have a negative impact on women, may increase the threat of osteoporosis. However, the premise is that the usual food originally lack of intake of sufficient calcium, or infrequent movement of people, coupled with post-menopausal women, due to the lack of estrogen caused by the loss of calcium, the above conditions plus a large amount of caffeine, may pose a threat to the bone. If you can enjoy it in reasonable amounts, you can still do it without choking. In addition, the following six types 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 will reduce calcium, 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 has a cancer risk for normal people.