According to the research of medical experts in the United States and Britain, milk contains two kinds of hypnotic substances unknown to people in the past. One of them is tryptophan synthesized by serotonin, which can promote sleep. Because of its function, people often need only a glass of milk to fall asleep. The other is a natural morphine substance with similar anesthetic and sedative effects. Therefore, if you drink milk in the morning, it will inevitably inhibit people's cerebral cortex and affect their 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 of milk can be absorbed by the human body only after it is decomposed into amino acids in the stomach and small intestine. In the morning on an empty stomach, the emptying of the stomach and intestines is very fast, so the milk is discharged to the large intestine before it can be digested. Therefore, nutrition experts believe that it is best to drink milk in the evening or half an hour before going to bed.
Everyone knows that drinking milk is good, but there are many stresses about drinking milk. If the drinking method is not appropriate, milk will not only help the body, but may also cause some harm:
1, don't drink raw milk, drink fresh milk and heat it at high temperature to prevent illness from entering the mouth;
2. Some people are used to drinking milk on an empty stomach, which is unscientific. Because eating on an empty stomach makes the intestines move quickly. Moreover, the protein in the milk will be quickly converted into energy and consumed. Nutrients in milk can't be digested and absorbed, so they are discharged to the large intestine, which leads to waste invisibly. It's best to eat something before drinking milk or drink it while eating food.
3. 80% of protein in milk is casein. When the pH of milk is below 4.6, a large amount of casein will agglutinate and precipitate, which is difficult to digest and absorb, and even lead to indigestion or diarrhea in severe cases. Therefore, it is not advisable to add acidic drinks such as fruit juice to milk.
4. Some people like to take medicine with milk instead of boiled water. In fact, milk obviously affects the human body's absorption of drugs. Milk is easy to form a covering film on the surface of drugs, so that minerals such as calcium and magnesium in milk react chemically with drugs to form water-insoluble substances, thus affecting the release and absorption of drug effects. Do not drink milk before and after taking the medicine 1 hour.
5, it is not appropriate to drink more cold milk, because cold milk will affect the gastrointestinal motility, causing mild diarrhea, so that most of the nutrients in milk can not be absorbed and utilized by the human body.
6. It is not advisable to cook at high temperature for a long time. Protein in milk will change from sol state to gel state under the action of high temperature, which will lead to sediment and reduce its nutritional value.
7. Milk and (dark) chocolate cannot be eaten together for two reasons:
First, the ingredients in chocolate will destroy the calcium in milk, so that calcium cannot be absorbed. In this way, some nutrients in milk can't be ingested. To put it bluntly, some milk is drunk for nothing.
Second, the ingredients of milk will affect the function of the ingredients beneficial to human body in chocolate, such as antioxidant and antithrombotic ingredients, which cannot be exerted in the presence of milk.
But eating milk and chocolate at the same time does not do much harm. Including milk chocolate is not inedible.