Lysine contained in milk can react with fructose under heating conditions to produce toxic fructosyl lysine, which is harmful to human body. Don't add sugar when boiling fresh milk. It's not too late to add sugar when the milk is cooked and cooled.

Milk can be a good companion of coffee, or it can be an invisible killer of health: coffee+milk = harmful to health.

Professionals also made it clear that putting bagged milk directly into the microwave oven will have a negative impact on human health. If the packaging material is not marked with the words "can be heated by microwave oven", it is not suitable for direct heating by microwave oven. Milk must be poured into a special container for microwave oven before it is heated in microwave oven. At the temperature below 100℃, ordinary plastics will not have problems. It is suggested to scald the milk bag with boiling water below 100℃ to keep the milk warm.

Love reminder: experts point out that if you can avoid heating and drinking, try not to heat it, so as to preserve the complete nutritional value of milk. Especially for children, complete milk nutrition is more conducive to growth and development. Like pure milk sold in shopping malls or supermarkets, the general health protection is relatively reliable, and there is no need to heat it when drinking.

What foods are not suitable for drinking with milk?

1. Milk and leeks or spinach can't be eaten together.

Milk mixed with leek contains more oxalic acid, which will affect the absorption of calcium.

Milk and juice can't be eaten together.

More than 80% of protein in milk is casein. For example, under acidic conditions, casein is easy to agglutinate, which easily leads to indigestion and diarrhea. Therefore, it is recommended not to eat fruit immediately after eating milk or dairy products.

3. oranges and milk can't be eaten together.

Oranges should not be eaten before and after drinking milk 1 hour. Because once protein in milk meets the fruit acid in orange, it will solidify, which will affect the digestion and absorption of milk. This time is not suitable for eating other acidic fruits.

4. Milk and sugar

Lysine contained in milk can react with fructose under heating conditions to produce toxic fructosyl lysine, which is harmful to human body. Don't add sugar when boiling fresh milk. It's not too late to add sugar when the milk is cooked and cooled.

5. Milk and chocolate

Milk is rich in protein and calcium, while chocolate contains oxalic acid, which will combine with food to form insoluble calcium oxalate, greatly affecting the absorption of calcium. Even dry hair, diarrhea, slow growth and so on.

6. Milk and medicine

Some people like to take medicine with milk instead of boiling water. In fact, milk will obviously affect the human body's absorption of drugs. Because milk is easy to form a covering film on the surface of drugs, minerals such as calcium and magnesium in milk react with drugs to produce water-insoluble substances, thus affecting the release and absorption of drug effects. So don't drink milk before and after taking the medicine 1 hour.

7. Milk and tea

When drinking milk, you should not drink tea at the same time, because tannic acid in tea will hinder the absorption of calcium ions in milk.

How to drink milk to be healthy

Everyone knows that drinking milk is good, and there are countless praises for milk at all times and in all countries. Compendium of Materia Medica holds that milk has the effect of "rejuvenation", and Alsi Boff, the father of western medicine, calls milk "the closest perfect food" and "the nanny of human beings".

Yu Ruomu, a famous nutritionist in China, compared milk to "the nectar brewed by nature for human beings". However, many consumers are not clear about the nutritional components of milk, how to choose the milk that suits them and how to drink milk correctly.

What are the nutritional components of milk?

Milk contains almost all nutrients needed by human body, among which protein and calcium are the most important nutrients. Protein and calcium are the material basis of life and health. These two nutrients are easily digested and absorbed by human body, especially from the perspective of calcium absorption, and they are natural and efficient calcium supplements. Drinking more milk can strengthen the body, beauty beauty, and prevent osteoporosis. The primary purpose of drinking milk should be to ingest protein and calcium. Other nutrients in milk, such as vitamins, can be obtained from vegetables, fruits and other daily foods because of their low content.

Is there a best time to drink milk?

According to common sense, some consumers think that drinking milk should be in the morning. Actually, this "common sense" is not correct. In the past, due to production methods, storage conditions and other reasons, milk was squeezed in the early morning and drunk in the morning. In fact, you can drink milk anytime and anywhere, and the normal temperature milk made of modern milk packaging technology can also make you "drink it if you want". Drinking milk for breakfast will provide adequate nutritional protection for one day's activities; Drinking milk at night not only helps you sleep, but also helps your body absorb nutrients. For office workers with tense rhythm, drinking milk in the morning or afternoon during work breaks can replenish energy and regulate body and mind; For women who love beauty, drinking milk at any time can also play a cosmetic role.

How much milk should I drink every day?

The daily intake of milk varies from person to person, and the daily milk consumption should be determined according to age, physique, work consumption and economic conditions. Generally speaking, adults drink 400-500ml a day, that is, two cups of milk. If economic conditions permit, it is best to reach three cups, that is, about 750ml.

Are you allergic to milk?

Just because some consumers feel uncomfortable after drinking milk does not mean that these consumers are not suitable for drinking milk. What's going on here? After weaning, if the baby stops drinking milk, the activity of lactase in the body will naturally decrease slowly, which will lead to the digestion and absorption of lactose in milk in adulthood, and there will be symptoms such as flatulence and diarrhea. As long as you insist on drinking milk and let your body adapt slowly, the activity of lactase will naturally recover. In addition, when drinking milk, you can eat some cereal or snacks. For example, you can add cereal to milk, drink it in small quantities for many times, and don't drink too cold milk, so that your stomach will not be allergic to "milk".

Which is better, packaged milk at room temperature or refrigerated milk?

From the main nutritional value, the two kinds of milk are almost the same. Normal temperature milk can be stored for a long time at room temperature because of ultra-high temperature sterilization technology and 6-layer composite paper packaging, and it is convenient to drink, especially suitable for busy consumers to buy whole boxes; Frozen milk is pasteurized and needs to be refrigerated all the time. The shelf life is usually about 7 days.

Don't talk about heroes with "thickness" and "lightness"

At present, there are some misunderstandings among consumers The most common thing is that the thicker the milk, the better, and the viscous milk with high nutritional content is good milk.

The milk just squeezed out is thicker because the fat globules in the milk are bigger, so it looks thicker. In the process of milk processing, there is a step called "homogenization", which is to further crush the fat globules in milk so that the fat can be fully dissolved in the milk, thus preventing the fat from being adsorbed on the packaging. The results of homogenization are as follows: fat globules are broken, which is more conducive to human digestion and absorption; Broken fat globules dissolve in milk to give off fat fragrance, which makes the milk taste more rich and mellow; After homogenization, sterilization and other different processing technologies, its nutritional value is not low at all. The quality of "thick" and "light" milk is only different in processing technology, and there is almost no difference in its nutritional composition. You can't judge the quality of milk by its consistency or lightness. There is a more convincing reason that adding thickener, stabilizer or milk powder can make milk look thicker.

Special milk takes care of special people.

Lactose in milk can lead to adverse metabolic reactions. It is reported that 85%-92% of adult Asians have extremely low intestinal lactase activity. After eating milk, they can't digest and utilize lactose in milk, and often have abdominal distension, bowel sounds and even diarrhea, which is called lactose intolerance. This metabolic disorder is lifelong and worsens with age. People with normal lactose response will also develop secondary lactose intolerance due to intestinal diseases or infections, but it is usually only temporary.

Low lactose liquid milk is another choice for this special population to enjoy milk. Dr. Yu Jinghua from the Technology Development Center of Beijing Sanyuan Food Co., Ltd. said that adding lactase to liquid milk can decompose lactose in milk, so that patients with lactose intolerance can safely drink milk. Ternary low lactose liquid milk is packaged in tetra pak brick, which belongs to ultra-high temperature sterilized milk, and its price is close to that of ordinary ultra-high temperature liquid milk.

Whether heating milk in microwave oven will destroy the nutrients of milk depends on the length of heating time. Because the heating speed of microwave oven is extremely fast, and the temperature of preserving milk nutrients should not be too high.

According to relevant data, the sterilization ability of microwave oven mainly comes from thermal effect and biological effect. Thermal effect can denature and solidify the cell protein of bacteria, leading to the death of bacteria. If milk is heated by microwave oven 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 the appearance of sediment and affect the quality of dairy products. The longer the milk is heated and the higher the temperature, the more serious the loss of nutrients, mainly vitamins, of which vitamin C is the most serious loss, followed by lactose.

Drink a glass of milk about 250 ml. If you use a gas stove to heat it, you usually cook it at 70℃ for 3 minutes and at 60℃ for 6 minutes. Then use the microwave oven 1 minute or so. However, it should be noted that there will be uneven temperature when heated in a microwave oven, so stir it before drinking to avoid burns.

Nutrient loss after fresh milk is heated?

Some people worry that nutrition will be lost after fresh milk is heated. Is that really the case? In fact, milk can certainly be heated moderately, but there are a few things you should know.

◎ Boiling milk with low fire: The vitamins in milk will be destroyed by oxygen.

◎ Boiled milk: Milk is rich in amino acids. At high temperature, amino acids in milk and sugar form fructosyl amino acids, which will not be digested and absorbed by human body, but will affect human health. Colloidal protein particles in milk will dehydrate into gel at 60℃. At this temperature, the phosphate in milk changes from acidic to neutral and precipitates.

So the heating temperature of milk should not be too high. Heating to 100℃ will not only reduce the color, fragrance and taste of milk, but also greatly reduce its nutritional value!

So, how to heat milk correctly? In fact, waterproof heating method is the most suitable. If you use microwave to heat it, you should pay attention not to take too long, because the nutrients of milk will still be destroyed when the temperature is high, and you should also pay attention to the uneven temperature when you use microwave to heat it, so shake it well before drinking it to avoid being burned.

In addition, people who like convenience often choose milk powder. The nutrition of milk powder is similar to that of fresh milk. When making milk powder, be careful that the temperature of water does not exceed 60℃.

Avoid misunderstanding when drinking milk.

Milk is rich in nutrition, which not only contains essential amino acids, but also contains high-content and easily absorbed calcium. Long-term drinking is very beneficial to the body. However, you must pay attention to the way you drink milk. The following are common misunderstandings about drinking milk. You must be careful to avoid-

Drink milk on an empty stomach

Drinking milk on an empty stomach will increase intestinal peristalsis, shorten the retention time of milk in the stomach, and make the nutrients in the body unable to be fully absorbed and utilized. It is best to drink milk with some starchy foods, such as steamed bread, bread, corn porridge and beans, which are beneficial to digestion and absorption.

Improper food mix

Milk should not be eaten with foods containing tannic acid, such as strong tea and persimmons. These foods easily react with milk and agglomerate, which affects digestion.

Preference for highly processed milk

The nutritional value of highly processed milk is not necessarily better than that of fresh milk. This is because after many times of processing, trace elements or inorganic salts are mostly added to milk, but these ingredients do not need to be supplemented by everyone, so they are not necessarily suitable for everyone.

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Knowledge of drinking milk

After drinking milk, some people will have rumbling stomach, pain and bloating, accompanied by diarrhea and other symptoms. This is because milk contains a kind of lactose. After birth, lactase in the intestine decomposes lactose in milk at the lactation stage of infants, and lactose will ferment and decompose in the large intestine to produce water, carbon dioxide and lactic acid. Lactic acid is not easily absorbed by human body. Carbon dioxide is a gas, which can cause flatulence, abdominal pain, bowel sounds, diarrhea and other symptoms.

What should adults do if they have this symptom after drinking milk?

1, pay attention to drink less, or drink a small amount of milk several times, and drink half a bottle at a time (1.20 ml). After drinking 1.2 months, the activity of lactase in the intestine may increase again, and there will be no symptoms of bowel sounds and diarrhea after drinking again.

Eating milk and eggs together is also a way. After the milk is heated, add the raw eggs and stir them. Eat them when they are half cooked. Eggs are most easily digested when they are half-cooked. This way of eating has complementary functions in both digestion and nutrition.

Who shouldn't drink milk?

1, people who lack lactobionic acid can't drink milk. Milk has a high lactose content and cannot be directly absorbed by the human body. It must be decomposed into galactose and glucose under the action of lactobionic acid in the digestive tract before it can be absorbed. If lactobionic acid is deficient, eating milk will cause abdominal pain and diarrhea.

2. Lead workers should not drink milk. Lactose in milk can promote the absorption and accumulation of lead and aggravate or cause lead poisoning.

3. After patients with iron deficiency anemia take iron supplements, if they drink milk, calcium and phosphate in milk will hinder the absorption of iron.

4, some patients with digestive tract diseases can't drink milk, milk can promote gastric acid secretion, thus aggravating and inducing digestive tract diseases. Therefore, patients with ulcerative colitis, reflux esophagitis, cholecystitis, pancreatitis and total gastrectomy had better not drink milk.

In addition, the following are some common sense about milk:

Milk should not be cooked for a long time, nor should it be overheated. A series of changes will take place when milk is heated. When heated again after boiling, lactose in milk will start to coke and gradually decompose into lactic acid and a small amount of formic acid, vitamins will be destroyed, and even the color, smell and taste will be significantly reduced. So hot milk is just cooked, so it should not be cooked for a long time.

Milk should not have too many cold drinks. Because cold milk will increase gastrointestinal peristalsis and cause mild diarrhea, especially for patients with gastrointestinal diseases such as ulcers and colitis, it will aggravate the condition. And most of the nutrients in milk can't be used.

Milk should not be frozen or stored in a thermos. After freezing, the fat, protein and other substances in milk have changed, and after thawing, there will be solidified precipitation and floating lipid precipitation, which will reduce the nutritional value. Therefore, it is appropriate to store milk at about 3℃. When the milk is hot, pour it into a thermos for preservation. Bacteria can easily mix into milk. Once bacteria enter milk, they can reproduce every 20 ~ 30 minutes, which makes milk deteriorate rapidly.

Drinking milk at night is better than drinking it in the morning. It is reported that drinking milk before going to bed has hypnotic effect. Medical scientists have observed that drinking a cup of hot milk before going to bed can make people fall asleep quickly and sleep sounder after midnight, especially for some people who can't sleep after waking up in the middle of the night. Because milk contains L- tryptophan which makes people feel tired and morphine which has sedative effect. If you drink milk in the morning, it will definitely affect your study and work during the day, 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 on an empty stomach in the morning. In fact, this is unscientific, because eating on an empty stomach accelerates gastric peristalsis, and the nutrients in milk are discharged to the large intestine before being digested and absorbed, resulting in a large loss and waste of nutrients. Therefore, it is best to drink milk before eating steamed bread and biscuits, so that the nutrients in milk can be fully exerted.

Bottled milk has been sterilized during processing, so it is not necessary to boil it when drinking. Boiling will denature protein, and calcium and phosphate will be destroyed and lose their nutritional value.

If milk is kept for a long time, it will go bad because of the reproduction of bacteria. Drinking spoiled milk will not only increase nutrition, but will cause diseases. Therefore, it is best to drink milk.