According to a study of medical experts from the United States and the United Kingdom, milk contains two kinds of hypnotic substances, one of which is serotonin synthesized by tryptophan that can promote sleep, and the other is a natural morphine-like substance that has similar anesthetic sedative effect. . Therefore, if you drink milk in the morning, you will inevitably suppress the cerebral cortex, affecting daytime work and learning.
In addition, drinking milk in the morning is not conducive to digestion and absorption. This is because the protein of milk is absorbed by the body after the decomposition of the stomach and small intestine to form amino acids. In the fasting state in the morning, the emptying of the stomach and intestines is very fast. Therefore, milk was discharged into the large intestine before it was digested. Furthermore, the proteins that are absorbed in the food can only form part of the body's tissue on the basis of sufficient calories. If the calorie is insufficient, the absorbed protein will quickly become calories and be consumed, which is undoubtedly a waste.