A, morning and evening is the best time to drink milk, drink milk at breakfast, to the day's vitality to provide adequate nutritional guarantee; drink milk at night, not only helps sleep, but also helps the body to absorb its nutrients. According to the United States and Britain, medical experts found that milk contains two kinds of past people unknown hypnotic substances, one of which is able to promote sleep to serotonin synthesis of tryptophan, due to its role, often only a cup of milk can make people fall asleep; another is similar to anesthesia sedation effect of natural morphine-like substances. Therefore, if you drink milk in the morning, it will inevitably inhibit the human cerebral cortex, affecting the daytime work and study. In addition, drinking milk in the morning is not conducive to digestion and absorption, this is because the milk protein through the stomach and the small intestine after the decomposition of amino acids can be absorbed by the body, and the morning fasting state, the stomach, intestinal emptying is very fast, so the milk can not be digested in time to be discharged to the large intestine. In addition, the protein absorbed in the food only on the basis of sufficient calories to form part of the body's tissues, if the calories are insufficient, the absorbed protein will soon become calories and be consumed, which is undoubtedly a waste of a great talent. Therefore, nutrition experts believe that milk is best in the evening or half an hour before going to bed to drink two, fasting can not: 1, drinking milk on an empty stomach is not good! As water accounts for a greater proportion of milk, drink more milk on an empty stomach, dilute the gastric juice, is not conducive to the digestion and absorption of food. In addition, fasting intestinal peristalsis is very fast, milk in the stomach and intestines through very quickly, the retention time is very short, and its nutrients are often too late to be absorbed, it is rushed into the large intestine, futile to go through the motions. Therefore, drinking milk on an empty stomach is not in line with nutritional hygiene. Ideal breakfast, should be protein, high-calorie meals, the number of not less than the amount of food throughout the day ?0?4. So it is best to change in the nap or late to drink milk before going to bed, in addition to the disadvantages and benefits, better play its role. If you have been used to drinking milk at breakfast, you must eat a little other food before drinking milk, so that the milk in the gastrointestinal stay some more time. If you want to drink a bottle of milk for breakfast, you can eat 50 grams of rice or pasta, plus an egg and a little soy sauce, dried tofu, and then drink milk, so that the milk in the stomach and other food mix, in the stomach and intestines to stay longer, is conducive to its nutrients digestion and absorption. As the food provides enough calories, digestion and absorption is slower and adequate, so that the blood sugar continues to be high, the morning will be full of energy. Milk can be heated, but do not boil. Because boiling, some vitamins will be destroyed, and the calcium in milk will form calcium phosphate precipitation, affecting the absorption of nutrients by the body. Cooking milk also has some learning, most people will be sugar into the milk and then add fire with cooking, which will make the milk lysine amino acids and sugar react at high temperatures, generating fructosyl lysine, this substance will not be digested and absorbed by the human body, but on the contrary, harmful to human health, so the milk should be boiled milk should be boiled and then add sugar when it is not hot. 2, experts remind the public should not drink milk on an empty stomach. According to reports, many people drink milk early in the morning, thinking that this can be completely absorbed nutrients. In fact, drinking milk on an empty stomach will soon be discharged into the large intestine through the stomach and small intestine, as a result of a variety of nutrients can not be digested and absorbed in time to be discharged from the body. The correct method should be to eat some food before drinking milk. Too much stomach acid leads to protein denaturation and precipitation, nutrients are not easy to be absorbed by the stomach and intestines, leading to serious indigestion and diarrhea. Therefore, it should be accompanied by some bread, cookies, snacks and milk with food. It can be seen, should not drink milk on an empty stomach for the following main reasons: first, it is easy to lead to diarrhea; second, the efficiency of absorption is not high. This is because the time it takes to pass through the gastrointestinal tract is too fast. Try to put the milk at the end of a meal of all the food before drinking, so as to facilitate absorption and improve tolerance. Third, before going to bed can be: drinking milk before going to bed is conducive to the body's absorption and utilization of calcium. Dinner intake of calcium, most of the body before bedtime absorption and utilization. After bedtime, especially after zero o'clock in the evening, the level of calcium in the blood will gradually decrease, the decline in blood calcium, promote the parathyroid gland hypersecretion, hormone action in the bone tissue, so that a part of the calcium salts in the bone tissue, dissolved into the blood, in order to maintain a stable balance of blood calcium. This dissolving effect is the body's self-regulation function, over time, will become one of the causes of osteoporosis. Drinking milk before going to bed at night, the calcium in the milk can be slowly absorbed by the blood, the whole night blood calcium has been supplemented to maintain the balance, do not have to dissolve the calcium in the bone, preventing bone loss, osteoporosis, so drink milk before going to bed is good. Fourth, control the total amount: To get the benefits of drinking milk to lose weight, it is necessary to control the total energy, drink more milk at the same time to reduce the intake of other foods, especially those with low nutritional value and high caloric value of food, such as sweet drinks, desserts, candies, puffed food, cold noodles, cold skin and so on and high-fat food, reduce the dinner staple food, in order to ensure that the balance of the total amount. If you drink milk between meals or before meals, it can help your body to reduce your appetite, and you will not eat too much for lunch and dinner. If the body is overweight or obese, it is not advocated to drink milk after meals or before going to bed. Five: drinking milk other misunderstandings: food with improper Milk and tannin-containing foods should not be eaten with food, such as strong tea, persimmons, etc., these foods are prone to react with the milk clumps into a ball, affecting the digestion. Prefer highly processed milk The nutritional value of highly processed milk is not necessarily better than fresh milk. This is because after many times of processing, most of the milk added trace elements or inorganic salts, but these ingredients are not everyone needs to supplement, so it is not necessarily suitable for everyone. Drinking milk learning Some people drink milk, the stomach will rumble, and pain and bloating, accompanied by diarrhea and other symptoms. This is because milk contains a kind of lactose, after life, in the infant breastfeeding stage of the intestinal lactase enzyme to break down the lactose in milk, lactose will be fermented in the large intestine, decomposition, producing water, carbon dioxide and lactic acid. Lactic acid is not easily absorbed by the body. Carbon dioxide is a gas, so it causes small intestinal flatulence, abdominal pain, bowel sounds, diarrhea and other symptoms. What should adults do if they have such symptoms after drinking milk? 1, we must pay attention to drink less, or a small number of times to drink, each time to drink half a bottle (120 ml) of milk, so insist on drinking 12 months later, lactase activity in the intestines may be re-increased, and then insist on drinking it will not occur intestinal tinnitus, diarrhea symptoms. 2, the use of milk and eggs to eat is also a way. When the milk is heated, put the raw egg stirring, half cooked to eat, the egg in the half-cooked most easily digested. This way of eating, whether in the digestive or nutritional aspects have complementary effects. Who should not drink milk? 1, people with lactose acid deficiency should not drink milk. Milk in the high content of lactose, can not be directly absorbed by the body, must be in the digestive tract under the action of lactose acid, decomposition for galactose and glucose can be absorbed. If lactose acid deficiency, milk consumption will cause abdominal pain, diarrhea. 2, lead workers should not drink milk. The lactose in milk can promote the absorption and accumulation of lead in the body, aggravating or causing lead poisoning. 3, iron deficiency anemia patients taking iron drugs, such as drinking milk, milk calcium and phosphate will hinder the absorption of iron. 4, some patients with digestive diseases can not drink milk, milk can promote gastric acid secretion, thereby aggravating and inducing digestive diseases. Therefore, patients suffering from ulcerative colitis, reflux esophagitis, cholecystitis, pancreatitis and total gastrectomy surgery, it is best not to drink milk. In addition, here for you to introduce some of the milk some common sense: milk should not be cooked for a long time or heating too many times. Milk in the heating to play a series of changes, when boiling and then continue to heat, milk lactose began to caramelize, and gradually decomposed into lactic acid and a small amount of formic acid, vitamins are also destroyed, and even make the color, aroma and taste are significantly reduced. So hot milk to just boil to the extent, should not be cooked for a long time. Milk should not be too much cold. Because cold milk will increase gastrointestinal peristalsis, causing mild diarrhea, especially for patients suffering from ulcer disease, colitis and other gastrointestinal diseases, will make the condition worse. And most of the nutrients in milk can not be utilized. Milk should not be frozen or put into a hot water bottle for storage. After freezing, the milk fat, protein and other substances have changed, and after thawing there will be coagulation precipitation and floating fat particles, the nutritional value of the decline. Therefore, storage of milk at about 3 ℃ is appropriate. Milk hot, poured into the hot water bottle storage, milk is easy to mix into the bacteria, once the bacteria into the milk, every 20 to 30 minutes will be able to reproduce a generation, so that the milk quickly spoiled. Milk is better to drink at night than in the morning. It has been reported that drinking milk before going to bed has a hypnotic effect. Medical scientists for experimental observation found that a cup of hot milk before going to bed, can make people fall asleep very quickly, and the second half of the night sleep more sweet, especially for some of the middle of the night to wake up and then can not fall asleep, its role is more obvious. Because milk contains L-tryptophan that makes the human body produce a sense of fatigue and have a calming effect of morphine-like substances. If you drink milk in the morning, it is bound to have a certain impact on the daytime study and work, so it is better to drink milk at night. It is best not to drink milk on an empty stomach. Some people like to drink milk in the morning on an empty stomach, in fact, this is not scientific, because eating on an empty stomach, stomach peristalsis faster, the nutrients in the milk can not be digested, absorbed in the colon, resulting in a lot of nutrient loss and waste, so it is best to drink milk before eating some steamed bread, cookies and other food before drinking milk, so that the milk nutrients to give full play to their role. Bottled milk in the process, has been sterilized, so do not need to boil when drinking. Boiling will denature proteins, calcium and phosphate will also be broken, losing nutritional value. Milk placed for a long time, due to bacterial reproduction and deterioration, drinking spoiled milk, not only will not increase the nutrition, but will cause disease. Thus, it is best to drink the milk after taking it.