Hello! My friend, children can drink milk before going to bed, because drinking milk at night is good for rest and sleep, and it is best to drink milk at night, because milk contains L tryptophan, a biochemical substance that can make people feel tired and sleepy, and trace morphine substances, all of which have certain sedative and hypnotic effects, especially L tryptophan, which is the main raw material for the brain to synthesize hydroxyl color, and serotonin plays a key role in brain sleep. It can temporarily inhibit the brain's thinking activities, thus making people want to sleep, without any side effects, and milk can be absorbed by sticking to the stomach wall, and calcium in milk can also clear the tension, so it is more beneficial to the sleep of the elderly, so drinking milk at night is good for people's rest and sleep. Drinking milk before going to bed is beneficial to the absorption and utilization of calcium. Most of the calcium ingested at dinner is absorbed and utilized by the human body before going to bed. After sleep, especially after midnight, the level of calcium in blood will gradually decrease, and the decrease of blood calcium will promote hyperparathyroidism. Hormones will act on bone tissue, so that part of calcium in bone tissue will be dissolved into blood to maintain the stable balance of blood calcium. This dissolution is a self-regulating function of human body, which will become one of the causes of osteoporosis after a long time. Drink milk before going to bed at night, the calcium in milk can be slowly absorbed by the blood, and the blood calcium can be supplemented and maintained in balance all night, so it is not necessary to dissolve the calcium in bones, which prevents bone loss and osteoporosis, so it is good to drink milk before going to bed. It seems to be a wise choice! I hope you can be satisfied!