1, refreshing: Coffee is rich in caffeine, which can stimulate the central nervous system and play a refreshing role. 2, help digestion: coffee contains certain acidic substances, which can stimulate gastric acid secretion, promote gastrointestinal peristalsis, and moderate drinking can alleviate symptoms such as indigestion and loss of appetite. 3, diuretic swelling: caffeine can enhance renal function, increase urination, promote the discharge of excess sodium ions in the body, and play a role in eliminating edema. 4, weight loss and slimming: Caffeine can speed up human metabolism, promote the discharge of harmful substances in the body as soon as possible, burn fat, and have a certain weight loss and slimming effect.