Morning and evening are the best times to drink milk. Drinking milk at breakfast can provide sufficient nutrition for the day's vitality. Drinking milk at night not only helps sleep, but also helps the body's response to the disease. Absorption of nutrients. According to research by medical experts from the United States and the United Kingdom, milk contains two hypnotic substances that were unknown in the past. One of them is tryptophan synthesized from serotonin, which can promote sleep. Due to its effect, only a glass of milk is often needed. It makes people fall asleep; the other is a natural morphine-like substance that has a similar narcotic and sedative effect. Therefore, if you drink milk in the morning, it will inevitably inhibit the human cerebral cortex and affect work and study during the day. In addition, drinking milk in the morning is not conducive to digestion and absorption. This is because the protein in milk must be decomposed by the stomach and small intestine to form amino acids before it can be absorbed by the body. In the fasting state in the morning, the stomach and intestines are emptied very quickly. Therefore, the milk is excreted into the large intestine before it has time to be digested. Furthermore, the protein absorbed in food can only form part of human tissue if there are sufficient calories. If there are insufficient calories, the absorbed protein will quickly turn into calories and be consumed. This is undoubtedly a waste of overuse. . Therefore, nutrition experts believe that milk is best consumed in the evening or half an hour before going to bed