1. The added sugar in milk should not exceed 10%, otherwise it will not only be difficult to digest and absorb, but also reduce its nutritional value, and it will remain in the digestive tract, affecting gastrointestinal function.
Milk can be heated, but don't boil it. Because boiling will destroy some vitamins, calcium in milk will form calcium phosphate precipitation, which will affect the absorption of nutrients by human body.
Milk is rich in calcium, so there is no need to supplement calcium. "Calcium-added milk" and "high-calcium milk" are unnecessary. Excessive calcium will combine with casein in milk to form clots and lose nutrition.
4. Don't just drink milk for breakfast. Because drinking milk on an empty stomach will accelerate gastrointestinal peristalsis and cause malabsorption. The principle of balanced diet requires that the diet consists of a variety of foods. If you can eat bread and cake at the same time for breakfast, it will make nutrition more balanced, provide more calories, and ensure mental and physical labor.
Don't eat chocolate when drinking milk. Because oxalic acid in chocolate will combine with calcium in milk to form calcium oxalate, calcium can not be fully utilized.
6. Don't eat milk with medicine. Because milk will react with many drugs, reduce the efficacy, and sometimes form new toxic substances. take medicine
1 hour without drinking milk.
Milk has high nutritional value and plays a great role in human health. Now people are more and more aware of the value of milk, but many people will make some mistakes when cooking milk. The following are some common incorrect practices.
Milk should not be cooked at high temperature for a long time. When milk is heated, the glial protein particles in milk will change, dehydrate at 60 ~ 62 degrees Celsius, turn into gel state, and then precipitate. When the temperature reaches 100℃, the lactose in milk will be coked, and the taste loss of milk will be greater. So milk should not be cooked for a long time.
Avoid using slow fire when boiling milk. It takes a long time to cook milk with slow fire, and vitamins and other nutrients in milk are easily destroyed by oxidation, thus reducing the nutritional value of milk.
Hot milk should not be stored in a thermos. With the passage of time, the temperature of hot milk will drop, and when the temperature is suitable, bacteria will multiply in large numbers, making milk rancid and deteriorated. Therefore, boiled milk should be drunk immediately after it is slightly cold and should not be stored for a long time.
Boil the milk first without sugar. Some people are used to boiling milk with sugar, which is not good. Because lysine and sugar in milk will react at high temperature.
Milk consumption has become an important part of modern life, and it has been recognized by the public in terms of nutrition, deliciousness and function. However, while drinking milk, we should also pay attention to the following points:
First, fresh milk exposure will lose vitamins A and B in fresh milk due to sunlight. After frozen milk, if the milk is granular, the taste will be obviously weakened. Protein in high-temperature cooked fresh milk and twice-heated fresh milk will change from sol state to gel state, which will lead to precipitation, thus reducing the nutritional value.
Second, the way to drink milk is also very important. Why do many people have diarrhea when drinking milk? Actually, there is something wrong with the way you drink milk. Drink milk in small sips as much as possible, so that the milk can be fully mixed with saliva in the mouth. If you gulp milk, the milk will directly enter the stomach and react with acidic substances, and protein and fat in the milk will form a ball, which is not easy to digest. Some people with weak gastrointestinal function will have symptoms of diarrhea and discomfort.
Third, milk and many substances cannot be drunk at the same time. When drinking milk, it is not advisable to drink tea at the same time, because tannic acid in tea will hinder the absorption of calcium ions in milk, and then milk will also hinder the medicinal properties of drugs, so that drugs can not give full play to their therapeutic effects.
Fourth, patients after gastrointestinal surgery should avoid drinking milk, because lactic acid fermentation in milk will produce gas and aggravate flatulence, which is not conducive to the healing of surgical wounds.
To sum up, although milk is good, we should also pay attention to the taboos of drinking. Make milk give full play to its efficacy.
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. Three things to pay attention to when drinking yogurt!
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. Morning and evening are the best time to drink milk, and drinking milk for breakfast provides sufficient nutritional guarantee for the vitality of the day; Drinking milk at night not only helps you sleep, but also helps your body absorb nutrients.
Some people insist on not drinking milk.
Lactate deficiency patient
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.
Patients with cholecystitis and pancreatitis
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.
Patients after abdominal surgery
Most of these patients have flatulence, and milk contains more fat and casein, which is not easy to digest in gastrointestinal tract. Gas can be produced after fermentation, which aggravates flatulence and is not conducive to the recovery of intestinal peristalsis.
Patients with digestive tract ulcer
Although milk can reduce the stimulation of gastric acid on ulcer surface, it can stimulate gastrointestinal mucosa to secrete a lot of gastric acid and aggravate the condition.
It is best to drink milk at night.
According to the research of American and British medical experts, milk contains two hypnotic substances, one is tryptophan synthesized by serotonin, and the other is natural morphine with similar anesthetic and sedative effects. Therefore, if you drink milk in the morning, it will inevitably inhibit people's cerebral cortex and affect work and study during the day.
In addition, drinking milk in the morning is not conducive to digestion and absorption. This is because protein in milk can only be absorbed by human body after it is decomposed into amino acids in stomach and small intestine. In the morning, on an empty stomach, the stomach empties quickly, so the milk is discharged into the large intestine and has not been digested. Furthermore, protein absorbed in food is consumed as heat, which is undoubtedly a waste.
Therefore, nutrition experts believe that it is best to drink milk at night or half an hour before going to bed.
Three common wrong ways to drink milk!
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.
The harm of men drinking milk often
Milk is rich in nutrition, and more and more people drink milk every day. However, many studies have found that men who drink milk regularly are prone to prostate cancer. Prostate cancer is a common malignant tumor in male reproductive system. A research team in Boston, USA, conducted a 1 1 year follow-up survey on 20,885 American male doctors. Dairy products mainly include skim milk, whole milk and cheese, among which 10 12 men suffer from prostate cancer. After statistical analysis, it was found that the plasma concentration of 1, 25- dihydroxyvitamin D3 (with anti-prostate cancer effect) in men who consumed 600 mg of calcium every day was significantly lower than that in men who consumed 150 mg of calcium from dairy products every day, and the risk of prostate cancer increased by 32%. After excluding age, weight, smoking, physical exercise and other influencing factors, it is found that men who eat more than 2.5 servings of dairy products every day (each serving is equivalent to 240ml of milk) have a higher risk of prostate cancer than men who eat less than 0.5 servings of dairy products.
Researchers in Philadelphia, USA, also confirmed through the epidemiological survey in recent years 10 that eating more dairy products will increase the risk of prostate cancer in men. Domestic studies have also found that milk intake is significantly related to the incidence of prostate cancer, which may be due to the high estrogen content in some brands of milk.
Fortunately, some plant compounds in fruits and vegetables have certain anticancer effects. Lycopene is an important carotenoid, which widely exists in fruits and vegetables. Tomatoes, apricots, guava, watermelon, papaya and red grapes all contain more lycopene, especially in tomatoes.
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American researchers conducted a six-year follow-up survey of 46,000 men and found 773 cases of prostate cancer. The study found that compared with people who don't eat raw tomatoes, people who eat raw tomatoes 2-4 times a week have a 26% lower risk of prostate cancer, and tomato pizza and ketchup also have this effect; Eating lycopene directly can also reduce the risk of prostate cancer. The antioxidant activity of lycopene is the strongest among natural carotenoids. It can protect the genetic material DNA (deoxyribonucleic acid), inhibit the proliferation of cancer cells and regulate the hormone state. Its anti-prostate cancer effect has been confirmed by a lot of studies.
Therefore, in order to care for the prostate, men should drink milk slowly and don't treat it as a drink. In addition, they should pay special attention to balanced nutrition and eat more tomatoes every day.
Four types of people need to drink milk regularly to supplement nutrition.
Computer worker
Scientists have found that when people are engaged in computer work, it is easy to cause vitamin A and vitamin B, mineral calcium and bioactive components that can inhibit X-ray radiation.
Osteoporosis patients
Experts pointed out that osteoporosis is not only related to calcium deficiency, but also closely related to the lack of manganese and vitamin D, because manganese, a trace element, not only participates in the activation process of various enzymes in the body, but also promotes the absorption of mineral element calcium by the human body together with vitamin D. Experts suggested that patients with osteoporosis should drink milk regularly while taking medicine and exercising under the guidance of doctors.
Patients with cardiovascular diseases
Through clinical observation and research, experts found that mineral elements such as potassium, calcium, zinc and protein methionine in milk have the functions of stabilizing human emotions and lowering blood pressure, while the unique components of orotic acid in milk also have the functions of lowering the cholesterol content in blood, protecting the heart by increasing protein level and reducing myocardial tension.
Patients with atrophic gastritis
Because protein in milk changes due to heat, these denatured protein and phospholipids in milk will be tightly adsorbed on the stomach wall, which will protect the gastric mucosa, stimulate the secretion of cells in the lower wall of gastric mucosa, and repair the damaged gastric mucosa. At the same time, lactose, a special component in milk, catabolizes to produce lactic acid and glucuronic acid, which can also increase the acidity required for gastric function, inhibit harmful bacteria from decomposing protein to produce toxins, and protect the stomach from the erosion of toxins, which is beneficial to the recovery and treatment of gastritis. Therefore, for patients with atrophic gastritis, it is advisable to drink more milk often.