Coffee has no weight loss effect. As a beverage, coffee contains caffeine, which has an exciting effect on the nerve center and is a stimulant. After drinking, it can dilate blood vessels, speed up the heartbeat and relieve fatigue. There is tannic acid in coffee, and drinking too much will reduce the absorption of iron; Drinking coffee can also be addictive. People who drink coffee for a long time suddenly stop drinking coffee, and some people will have symptoms such as irritability, irritability and fatigue, and the symptoms will be alleviated after drinking coffee again. Drinking coffee will make the heart beat faster, which is not recommended for heart patients. If people with potential heart disease drink coffee, some people will suddenly have arrhythmia (more common in supraventricular arrhythmia). Therefore, drink coffee in moderation and pay attention to the precautions for drinking coffee. It is best not to use coffee as a common drink. Coffee has the function of losing weight. Coffee can lose weight mainly because it contains quinoline acid and chlorogenic acid as the main fat-dissolving factors. The higher the concentration of this lipolytic factor, the more obvious the weight loss effect will be. This lipolytic factor has a certain test on the human body's endurance. Don't take too much, otherwise it will have a bad influence on the human body. Although coffee has a certain weight loss effect, making a reasonable diet plan and exercise plan will get twice the result with half the effort. Pay more attention to diet, eat more fruits and vegetables rich in cellulose and vitamins, and don't eat high-fat and high-calorie foods. Foods rich in vitamins and cellulose can effectively inhibit the proliferation of body fat. Exercise is mainly aerobic exercise, which can accelerate the oxidative consumption of fat and calories in the body and achieve the purpose of losing weight.