Beer can promote the function of gastrointestinal tract, promote the peristalsis of gastrointestinal tract and increase the absorption of nutrients by gastrointestinal tract. Beer consists of malt, alcohol, fructose and yeast. After drinking beer, these substances will promote gastrointestinal peristalsis, increase gastrointestinal function and improve gastrointestinal metabolism. Drinking a small amount of beer is good for gastrointestinal absorption. A small amount of drinking can also promote sleep. Generally, beer within 500ml before going to bed can promote sleep and improve sleep state. Drinking a little beer can also improve microcirculation. For patients with mild cardiovascular and cerebrovascular diseases or mild arteriosclerosis, drinking no more than 300ml per meal and no more than 500ml per day can improve the body's blood circulation and arteriosclerosis, but don't drink too much, no more than 500ml per day, especially those who need to drive.