Milk is rich in nutrition, and more and more people drink milk every day. However, many studies have found that men who often drink milk are prone to prostate cancer. Prostate cancer is a common malignant tumor in male reproductive system. A research team in Boston, USA, conducted a follow-up survey of 20,885 American male doctors for as long as 1 1 year. The dairy products consumed mainly include skim milk, whole milk and cheese, among which1kloc-0/2 men developed prostate cancer. After statistical analysis, it was found that the plasma concentration of1,25-dihydroxyvitamin D3 (with anti-prostate cancer effect) in men who ingested 600 mg of calcium every day was significantly lower than that in men who ingested 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 was found that men who ate more than 2.5 servings of dairy products every day (each serving is equivalent to 240ml of milk) had a 34% higher risk of prostate cancer than those who ate less than 0.5 servings of dairy products. Researchers in Philadelphia, USA, also confirmed that eating more dairy products will increase the risk of prostate cancer in men through an epidemiological survey in recent years. 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 anti-cancer effects. Lycopene is an important carotenoid, which widely exists in fruits and vegetables. Tomato, apricot, guava, watermelon, papaya and red grapes all contain more lycopene, especially in tomato. American researchers conducted a six-year follow-up survey of 46,000 men and found that 773 cases developed 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 status. Its anti-prostate cancer effect has been confirmed by a large number 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 nutritional balance and eat more tomatoes every day.

Milk does not need to be boiled.

Usually, the temperature requirement of milk disinfection is not high, and it takes 3 minutes at 70℃ and 6 minutes at 60℃. If it is boiled and the temperature reaches 100℃, the lactose in milk will be coked, while caramel can induce cancer. Secondly, after boiling, calcium in milk will precipitate with phosphoric acid, thus reducing the nutritional value of milk.

Don't add sugar when boiling milk.

Some people often cook milk with sugar in order to make it saccharified quickly, which is unscientific. Because lysine and fructose in milk will produce a toxic substance-fructosyl lysine at high temperature. This substance can't be digested and absorbed by human body, and it will do harm to human body. If you want to drink sweet milk, you'd better wait until the milk is boiled before putting sugar.

The thicker the milk, the better.

Some people think that the thicker the milk, the more nutrients the body gets, which is unscientific.

The so-called over-concentrated milk refers to adding more milk powder and less water to milk, so that the concentration of milk exceeds the normal proportion standard. Some people are afraid that fresh milk is too weak, so they add milk powder to it. If infants often eat thick milk, it will cause diarrhea, constipation, loss of appetite, and even refusal to eat, and it will also cause acute hemorrhagic enteritis. This is because the organs of infants and young children are delicate and cannot bear the heavy burden and pressure.

Avoid adding calcium powder to milk

Protein in milk is mainly casein, lactalbumin and lactoglobulin, and the content of casein is the most, accounting for 83% of milk protein, and casein is composed of OCK-, K-, β-and γ-casein. If you add calcium powder when drinking milk, too much calcium ion will combine with OCK- and β-casein, which will make milk coagulate. In addition, calcium will combine with other proteins in milk to produce precipitation, especially when heated.

This phenomenon is more obvious. Therefore, to supplement calcium for children, calcium powder should not be added to milk.

Avoid taking medicines with milk.

There are many calcium and iron plasmas in milk and its dairy products. Generally, every liter of fresh milk contains 0/300 mg of calcium/kloc and 0.4 mg of iron. These ions and some drugs (such as tetracyclines) can form stable complexes or insoluble salts, which make drugs difficult to be absorbed by gastrointestinal tract, and some drugs are even destroyed by these ions. If these drugs are taken with milk, it will greatly reduce the concentration of drugs 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 the medication time by 1 half an hour.

Avoid drinking cold milk in summer.

In hot summer, many people covet convenience and coolness, and like to drink cold milk, which is actually harmful. Milk is rich in nutrients and contains protein, mainly casein, followed by lactalbumin and lactoglobulin. Due to the high temperature in summer, milk is a good culture medium for bacteria. After a few hours of cooling, boiled milk will be contaminated and propagated by bacteria, which will easily cause intestinal diseases after drinking. Therefore, it is better to drink hot milk than cold milk in summer. Because hot milk not only kills bacteria, but also denatures protein in milk, which is more conducive to human digestion and absorption.

Oranges and milk-before and after drinking milk 1 hour or so, oranges should not be eaten.

Because once protein in milk meets the fruit acid in orange, it will solidify, which will affect the digestion and absorption of milk, and it is not suitable to eat other acidic fruits during this time.

Milk and chocolate

The reaction between them affects the absorption of calcium in milk.

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.

It is not advisable to drink milk on an empty stomach.

Milk contains a lot of protein. If you drink it on an empty stomach, protein will "be forced" to convert it into heat energy and consume it, which will not play a nourishing role. The best way to drink it is to eat it with food containing flour, or to drink it two hours after a meal, or to drink it before going to bed. It not only has the functions of nourishing health care, promoting digestion, but also has the function of exhausting air and relaxing bowels.

It is not advisable to add orange juice or lemon juice to milk to increase flavor.

It seems a good idea to add orange juice or lemon juice to milk, but in fact, orange juice and lemon are fruits with high fruit acid. When fruit acid meets protein in milk, protein will be denatured, thus reducing the nutritional value of protein.

It is not advisable to add rice soup and porridge to milk.

Some people think that this can make the nutrition complementary. In fact, this practice is very unscientific. Milk contains vitamin A, while rice soup and porridge are mainly starch, which contains lipoxygenase, which will destroy vitamin A. Children, especially infants and young children, if they don't get enough vitamin A, they will be stunted and sickly. Therefore, even to supplement nutrition, the two should be eaten separately.

Bottled milk cannot be dried in the sun.

Someone learned from the advertisement that vitamin D should be supplemented to supplement calcium, and more sunshine is a good way to get vitamin D, so they put the bottled milk in the sun according to the prescription. In fact, this is not worth the loss. Milk may get some vitamin D, but it loses vitamin B 1, vitamin B2 and vitamin C. Because these three nutrients will decompose in the sun, so that some or all of them are lost; Moreover, lactose will ferment in the sun, which will make milk go bad.

Condensed milk cannot replace milk.

Condensed milk is a kind of milk product, which is made by evaporating fresh milk to 2/5 of its original capacity, then adding 40% sucrose and canning. Some people are influenced by "everything that is concentrated is the essence", so condensed milk is used instead of milk. This is obviously wrong. Condensed milk is too sweet and must be diluted with 5-8 times of water. But when the sweetness meets the requirements, the concentration of protein and fat is often reduced by half compared with fresh milk. If water is added to condensed milk to make the concentration of protein and fat close to that of fresh milk, the sugar content will be higher.