Black coffee has the function of lowering blood fat and blood sugar. If you like drinking coffee to lose weight, you can drink black coffee without sugar or milk. But it is not recommended that you drink on an empty stomach. Caffeine can promote renal function, expel excess sodium ions from the body, increase urination, improve abdominal distension and edema, and help to lose weight. Black coffee is more diuretic. Coffee can increase high-density cholesterol, accelerate the metabolism of bad cholesterol, reduce coronary atherosclerosis and reduce the probability of stroke. Drinking a cup of black coffee after a meal can effectively whiten the skin. Black coffee can also promote cardiovascular circulation. People with low blood pressure can get better by drinking a cup of black coffee every day. In the process of brewing coffee at high temperature, it will also produce an antioxidant compound, which is helpful for anti-cancer, anti-aging and even prevention of cardiovascular diseases, and can be comparable to fruits and vegetables. Bathing with coffee powder is a kind of hyperthermia, which has the function of losing weight.