Introduction: It is our most common and nutritious drink. Many people love to drink it, but we should pay attention to it, otherwise it will become a "murderer" that harms health. So what are the taboos of drinking? Who can't drink milk? When is the best time to drink milk? Next, I will give you answers one by one and tell you some healthy ways to drink milk. Go and have a look.

Japanese milk eight

First, avoid simmering.

Boiling milk with slow fire will destroy the vitamins in milk by oxygen in the air, while boiling milk with strong fire is easy to overflow. Therefore, when the milk expands in volume, it should immediately leave the fire source and then boil it on the tempering. Repeated for three or four times can not only keep the nutrients in milk, but also kill the original microorganisms in milk.

Second, avoid boiling milk for too long.

Some people think that it is appropriate to cook milk for another 5 minutes, which is not comprehensive. Because the colloidal protein particles in milk can be dehydrated and transformed into gel state at 60℃. Calcium phosphate in milk is also unstable, and it is easy to change from acidic to neutral precipitation at this temperature. When heated to 100℃, milk will undergo complex chemical changes, which will not only reduce its color, aroma and taste, but also produce other substances, thus reducing its nutritional value. At present, most milk is scientifically sterilized and sealed, and can be directly drunk. If you want to drink hot milk, you can take the method of heat preservation and put the milk bag in hot water for 5 minutes, which can retain more nutrients.

Third, avoid the sun.

In life, it is often seen that milk is directly irradiated by sunlight for a long time on the way of milk delivery and milk collection, so that sunlight will mercilessly destroy the nutrients in milk and even make it deteriorate. Exposure to sunlight for 2 hours will lose half of the riboflavin in milk, and the fluorescent riboflavin converted from riboflavin by sunlight will further destroy vitamin C, so milk should be protected from light and should not be exposed for a long time.

Fourth, avoid adding sugar to cook.

Many people add sugar when boiling milk, thinking that it can make the sugar melt as soon as possible, but it is very unscientific to put sugar when heating. Because milk contains lysine and sugar contains fructose, these two substances will form a combination-fructosyl lysine at high temperature. This substance can't be eaten by human body, which destroys the nutritional value of protein. To make matters worse, it may be toxic to human body, so don't put sugar in milk when it is heated. If you want to drink milk with sugar, you can add sugar after the milk is a little cold.

Five, avoid eating with oranges.

Milk is decomposed in the stomach by pepsin and pancreatin, and then absorbed in the small intestine. If milk is eaten together with fruits with high fruit acid content such as oranges, protein in milk will have complicated biochemical reactions with fruit acid and vitamin C, which will affect protein in milk and vitamin C in oranges, and there will be adverse reactions such as abdominal pain and diarrhea, and eating together will not pay off.

Sixth, avoid adding

Some people like to eat with milk to get rid of the strange smell in milk, which is unscientific. Milk is rich in protein and calcium. When eaten together, calcium in milk combines with oxalic acid in chocolate to form insoluble calcium oxalate, which can not only be absorbed by people, but also cause hair dryness, diarrhea and calcium deficiency after a long time. Therefore, the time for drinking milk and eating chocolate should be separated, and it is best to eat carbohydrates such as biscuits and bread when drinking milk.

Seven, avoid adding calcium powder.

Protein in milk is mainly casein, whey protein and lactoglobulin, among which the content of casein is the largest, accounting for 83% of the protein of milk, and casein is composed of OCK-, K-, β-and γ-casein. If calcium powder is added when drinking milk, too many calcium ions will combine with OCK- and β-casein, which will make milk coagulate. In addition, calcium will combine with other protein in milk to produce precipitation, especially when it is heated. So give your child calcium, and don't add calcium powder to the milk.

Eight, avoid taking medicine with milk.

Milk and its dairy products contain a lot of calcium and iron plasma. Generally, every liter of fresh milk contains calcium 1 mg, iron 0 and 4 mg. These ions can form stable conjugates or insoluble salts with some drugs (such as tetracyclines), which makes it difficult for drugs to be absorbed by gastrointestinal tract, and some drugs are even destroyed by these ions. If this kind of medicine is taken with milk, it will greatly reduce the drug concentration in the blood and affect the therapeutic effect. Therefore, drugs should not be taken with milk. Eating milk and its products should be separated from taking medicine for one and a half hours.

Teach you to drink milk correctly

1. How much milk should each person drink every day?

As a food with high nutritional value, it is difficult to play its due role by drinking less, and it is also difficult to drink more. Therefore, everyone should determine the daily milk intake according to age, physical and mental consumption and their own economic conditions. Generally speaking, adults should drink 400 ~ 500ml, that is, two bottles of milk. It is recommended to drink at least 250ml, that is, one bottle of milk. Economic conditions allow the best three bottles, that is, about 750 ml, but not more than 1000 ml. Simply put, it means "guarantee one bottle and strive for two bottles, preferably three bottles and no more than four bottles".

2. When is a good time to drink milk?

Milk is a basic food and should be drunk after meals. It is best to drink one bottle for breakfast every day and two bottles in the morning and evening. You can also drink it outside three meals according to your personal living habits, but you should pay attention to eating starch-rich food before drinking, so that milk can stay in your stomach for a long time, which is conducive to the comprehensive absorption and utilization of nutrients. Simply understood, it is "morning, noon and evening, it is best to drink after meals."

3. Does drinking milk have protective effect on the stomach?

Because milk can form a good protective layer on the surface of gastric mucosa, it can reduce the erosion of gastric mucosa by food such as alcohol and reduce the occurrence of gastric diseases. It is reported that in Japan, people who drink milk have a low chance of developing gastric cancer. On the contrary, drinking alcohol, especially alcoholism, will increase the burden of internal organs and induce or aggravate the occurrence or change of the stomach. Therefore, we still advocate "drink more milk and less alcohol, and it is best to use milk instead of wine".

4. Which is better, fresh milk or milk powder?

Milk powder is a fine powder made of fresh milk after concentration, spraying and drying. The main nutritional components such as protein, fat and inorganic salts have not changed much, but the utilization rate of amino acids has decreased, and some active substances such as vitamins and immunoglobulins have been destroyed, especially vitamins C and B 1. So if conditions permit, it is better to drink fresh milk. However, milk powder is easy to store, transport and carry, and it is still a good nutritious food for field workers and rural residents who are remote and lack refrigeration equipment. It is worth mentioning that after the "milk powder incident", consumers should choose brands and manufacturers with good quality and good reputation when buying milk powder, and beware of counterfeit and shoddy products.

When is the best time to drink milk?

The time of drinking milk also has a certain influence on the digestion and absorption of nutrients in milk. The time for children to drink milk depends on the times, time and quantity of drinking milk every day, and adults should pay attention to the time for drinking milk.

Some adults have the habit of drinking milk in the morning, which is unscientific. The reason is that after a night's sleep, people's stomachs have already been emptied, ready to eat and digest food. At this time, their stomachs are also emptied quickly. Milk is liquid milk, so their stomachs are excreted faster. Drinking milk on an empty stomach is discharged into the intestine before it is fully digested and absorbed in the stomach, leading to the loss of nutrients. Milk is rich in high quality protein. The main function of these protein is to form new tissues of the human body, and at the same time to repair the original tissues. If you drink milk on an empty stomach, not only will the milk be quickly discharged from your stomach, but the above-mentioned precious protein will also be decomposed by the human body and consumed as heat, which will not give full play to the due role of protein. I'm sorry.

Protein in milk is digested and decomposed into various amino acids by pepsin and small intestine in human stomach, and then it can be absorbed and utilized in small intestine. Drinking milk on an empty stomach makes some protein not break down into amino acids, and some amino acids are discharged into the large intestine before being absorbed by the small intestine. In the large intestine, these protein and amino acids are decomposed into substances harmful to human body, which makes the precious protein unable to play its due role. It also increases the burden on the human body.

To change this situation, first do not drink milk on an empty stomach in the morning, but drink milk after breakfast 1-2 hours later. There is food in the stomach to prevent the shortcomings of drinking milk on an empty stomach; Second, eat some starchy food before drinking milk, such as steamed bread; Third, when drinking milk in the morning, we should eat some starchy foods such as steamed bread, rice, bread, biscuits and snacks, so that milk can stay in people's stomachs for a long time, milk and gastric juice can be fully hydrolyzed, and protein can be well digested and absorbed.

Milk has hypnotic and sedative effects. Morning is a time for people to study and work energetically. Drinking milk will make people sleepy, but it is not good for study and work, so it is best not to drink milk on an empty stomach in the morning.

When is a good time to drink milk? 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 a small amount of morphine, 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. Serotonin plays a key role in brain sleep, which can temporarily inhibit brain thinking activities, thus making people want to sleep without any side effects. Moreover, milk can be absorbed on the stomach wall, and calcium in milk can also eliminate tension.

Drinking milk before going to bed is beneficial to the body's absorption and utilization of calcium. Most of the calcium taken in dinner is absorbed and utilized by the human body before going to bed. After sleep, especially after midnight, the level of blood calcium 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, and the stable balance of blood calcium will be maintained. 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. Calcium in milk can be slowly absorbed by blood, and blood calcium can be supplemented to maintain the balance all night, so there is no need to dissolve calcium in bones to prevent bone loss and osteoporosis. Therefore, drinking milk before going to bed is beneficial.

Health alert: 10 people should not drink milk.

1, patients should not drink milk.

Although milk can relieve the gastric acid on the ulcer surface, it will make the gastrointestinal mucosa secrete a lot of gastric acid and aggravate the condition.

2. Patients with iron deficiency anemia should not drink milk.

Iron in food needs to be converted into ferrous in the digestive tract before it can be absorbed and utilized. If you drink milk, ferrous iron in the body will combine with calcium salt and phosphorus salt of milk to form insoluble compounds, which will affect the absorption and utilization of iron and is not conducive to the recovery of anemia patients.

3, usually, fart, abdominal pain and diarrhea and other symptoms should not drink milk.

Although these symptoms are not caused by milk, drinking milk will aggravate them. Therefore, people who usually fart, have abdominal pain and diarrhea should not drink milk.

4. Patients after abdominal surgery should not drink milk.

Most of these patients have flatulence, and milk contains more fat and casein, which is difficult to digest in the gastrointestinal tract. Gas can be produced after fermentation, which aggravates flatulence and is not conducive to the recovery of intestinal peristalsis.

5. Patients with lactobionic acid deficiency should not drink milk.

The content of lactose in milk is high, but it must be decomposed into galactose and glucose under the action of lactobionic acid in digestive tract before it can be absorbed by human body. If lactobionic acid is deficient, eating milk will cause abdominal pain and diarrhea.

6. Patients with cholecystitis and pancreatitis should not drink milk.

The digestion of fat in milk needs the participation of bile and pancreatic lipase, and drinking milk will increase the burden on gallbladder and pancreas, thus aggravating the disease.

7. Patients with reflux esophagitis should not drink milk.

Milk containing fat will affect the contraction of lower esophageal sphincter, thus increasing the reflux of gastric juice or intestinal juice and aggravating the symptoms of esophagitis.

8. Lead workers should not drink milk.

Lactose in milk can promote the absorption and accumulation of lead in human body, aggravate and cause lead poisoning, dizziness, insomnia, fatigue and other symptoms. At the same time, children who may have excessive lead should not drink milk.

9, kidney calculi patients should not drink milk.

After sleep, urine volume decreases and various tangible substances in urine increase, which can thicken urine. Because milk contains more calcium, kidney calculi mostly contains calcium. The most dangerous factor of stone formation is the sudden increase of calcium concentration in urine in a short time. 2 ~ 3 hours after drinking milk is the peak of calcium elimination through the kidney. At this time, it is in a state of sleep, urine is concentrated, and calcium passes through the kidney more, which is easy to form stones.

10, people who are allergic to milk should not drink milk.

Some people will have symptoms such as abdominal pain and diarrhea after drinking milk, and some people with severe allergies will even have rhinitis, asthma or urticaria.

Conclusion: To sum up, we know that drinking milk must pay attention to its taboos. People who can't drink milk must avoid it. Only by drinking milk correctly can they drink well.