Milk is rich in vitamins and proteins, so it is good for the body to drink milk after meals. However, it is best to drink it half an hour or an hour after a meal, which will make the milk stay longer in the digestive tract and the nutrients in the milk will be fully absorbed. The enzymes in milk help in the digestion of food and have a laxative effect. The best time to drink milk is half an hour before going to bed at night, because the trace elements in milk have a sedative and hypnotic effect, which can eliminate the tension of a day’s work and make the body relax effectively. After going to bed, the calcium contained in the milk will replenish the calcium lost in the blood and keep the body’s calcium balance. Never drink milk on an empty stomach, because the lactose in milk cannot be digested in time and will produce acid in the intestines, stimulating intestinal contractions, which can lead to abdominal pain and diarrhea.