Drinking too much milk. Can it cause cancer? Please, 3Q

Mainly a British female professor proposed that the IGF-1 contained in milk is carcinogenic, for specific explanations, please see the explanation of Professor Chen Yourong, a professor of nutrition and fermentation at Shanghai Fisheries University in China, as follows Milk is recognized as a nutritious food all over the world, and it has not changed so far. It is rich in nutrients: carbohydrates, minerals, vitamins, proteins, fats.

I also read the original English text of this article. If this female scientist really has this thing, I think that one person cannot represent this statement, and it is necessary to do a large number of rigorous controlled experiments to prove it, both clinical and animal. IGF-1 is a growth factor, both humans and animals themselves, it has a growth-promoting effect, and in many countries it is a drug used to promote the physical growth and development of children.

This further confirms that it is not included in the list of carcinogenic agents. I would like to add a question: why would anyone pay so much attention to the relationship between milk and cancer?

This is closely related to one thing. In 1994, the FDA (Food and Drug Administration) approved the use of RBGH (recombinant bovine growth hormone), which can be used to promote milk production in dairy cows, which can increase production by up to 15%-20%. However, when milk production is increased, the level of IGF-1 in this milk also increases (it may not be a year-on-year increase, but it does increase).

When drinking such milk, people have a higher intake of IFG-1 than the milk produced by ordinary cows that have not used this hormone, which is several times higher. Further follow-up studies of women who drank this type of milk found that they did have a higher chance of developing breast cancer. This result led to the belief that IGF-1 is a carcinogenic agent and that milk is related to breast cancer.

But there is no conclusive evidence of a causal relationship between the two. Whether Chinese dairy farms use this hormone is not certain. If I had to suggest a countermeasure, I would say the following

If consumers have doubts about milk with such hormones, they can choose not to buy it, only buy milk without added hormones or simply drink soy milk, so that the risk is low. Can milk with prolactin added be understood as a genetically modified food? I think so, and there may be other ingredients in this milk besides the increase in IGF.

Before reaching a conclusion, we should still let consumers know what they are buying, and consumers have the right to know and choose freely. However, this involves the labeling of genetically modified foods that are being discussed in our country.

No, it won't. Who would dare to drink milk after you say that.

Drinking too much milk can cause cancer.

The first reason is that milk may contain carcinogenic substances, mainly insulin-like growth factor (IGF-1).

Because growth hormone is commonly used in foreign countries to promote milk production in dairy cows, milk contains more of this factor. IGF-1 is a factor necessary for the growth and development of minors, but it also promotes the proliferation of cancer cells, so excessive amounts in adults can increase the risk of cancer.

The problem is that the feeding level of dairy farmers in China is relatively low, and there is no economic strength and technical level to apply growth hormone, so the possibility of high IGF-1 content in milk is relatively small.

The second reason is that there is a positive correlation between dairy consumption and the incidence of prostate cancer.

In other words, people who drink a lot of milk also have a greater risk of prostate cancer.

In fact, survey data suggest that although the risk of prostate cancer may increase with increased dairy consumption, the risk of colon cancer decreases. Multiple surveys have concluded that there is no correlation between dairy products and the incidence of prostate cancer.

These studies suggest that the same food may have different effects on different diseases. There are pros and cons to any kind of food, there is no absolutely good food, and there is no absolutely bad food.

In addition, fortified AD milk and yogurt provide a significant amount of vitamin B2, vitamin A and vitamin D. Therefore, drinking just a glass of milk can have a significant nutritional effect without increasing the risk of cancer.

The third reason is the results of animal experiments by Professor Colin Campbell of Cornell University in the United States.

His experiments with rats showed that if bovine casein was added to a diet mixed with carcinogens20, the risk of developing tumors was significantly increased compared to those with plant-based protein and low protein intake, and it could promote tumor development at all stages.

Drinking too much milk increases the risk of death and causes cancer? What do the experts have to say?

No, it won't. Who would dare to drink milk after you say that.

In recent years, with the development of the Internet, the speed of rumor spread has also been greatly improved, and refuting rumors has become one of the important tasks of scientific and technological workers and science and technology workers. In this regard, nutrition expert Fan Zhihong said: "The fight against rumors is a long-term process. ”

There is no evidence that milk can cause cancer, so drinking milk cannot cause cancer.

Well-known popular science writers have pointed out that the FDA, the World Health Organization and the Joint Expert Committee on Food Additives of the Food and Agriculture Organization of the United Nations have all agreed that "there is no evidence that IGF-1 causes cancer". At the same time, the content of IGF-1 in milk is very low, and after heating, digestion and absorption, it no longer has biological activity when it reaches the human body, and does not pose a health hazard.

Milk does contain IGF-1. However, IGF-1 is not inherently a "bad guy".。This is a factor in the normal regulation of the human body.

As long as it is not excessive, it can always live peacefully with our human body and also promote growth.

IGF-1 is a protein in its own right. After drinking, it enters the intestines and is mostly broken down by the body's digestive enzymes. At the same time, the pre-factory processing of milk can also lead to the inactivation of endogenous IGF-1.

Studies have shown that:Daily consumption of milk containing IGF-1 does not cause changes in the concentration of IGF-1 in the body's blood and does not directly cause cancer.

At the same time, the claim that milk causes cancer also stems from a misunderstanding of an experiment conducted by a scientist named Campbell. He fed rats aflatoxin, a carcinogen. After the mice developed cancer, he fed the mice with two separate feeds.

One feed contains 20% gluten and the other 20% tyrosine. The results showed that cancer cells grew faster in rats fed 20% tyrosine. Therefore, some people believe that milk promotes the development of cancer.

Actually, no! There are two main reasons for this experiment's results.

First, in the experiment, the carcinogen aflatoxin used by the experimenter induced cancer, which cannot be considered tyrosine-induced cancer in rats.

Third, in the experiment, tyrosine content accounted for 20% of the total protein content of the feed, whereas according to the USDA Nutrient Database, there were only grams of tyrosine per 100 grams of milk. According to the Dietary Guidelines for Chinese Residents, it is recommended that Chinese residents consume 300 grams of dairy products per person per day, which contain grams of protein, while the total protein intake of Chinese residents per person per day is about 70 gramsThe tyrosine content in milk only accounts for 7% of the total protein content, which means that each person needs to drink about 9 litres of milk per day to achieve the tyrosine content required for the experiment.

Milk causes cancer is just a rumor, and there is no clear evidence that drinking milk increases the risk of cancer.

What are the benefits of drinking milk?

1. Milk has a calming effect on the human body. People will feel a sense of calmness after eating milk, so drinking a glass of milk before going to bed at night will play a role in calming the nerves and promoting sleep.

2. Milk can heal stomach and duodenal ulcer diseases. Milk also has anti-stomach cancer properties.

3. Milk and fermented kefir can reduce carcinogenesis. 85% of carcinogens are mutagenic mechanisms, so drinking milk or yogurt often has anti-cancer effects.

4. Drinking milk can also prevent and treat high blood pressure and heart disease.

5. It can prevent the human body from absorbing toxic metals such as lead and cadmium in food.

6. The iron, copper and vitamin A in milk have a beauty effect, making the milk smooth and plump.

7. The calcium in milk can strengthen bones and prevent bone atrophy and fractures.

8. The magnesium in milk can make the heart and nervous system resistant to fatigue.

Who is not suitable for drinking milk?

1. Lactose intolerant people: lactose intolerant people should control the dosage, generally within 200 ml is no problem, but individuals can only drink very little milk or even not drink milk at all, otherwise it will cause and.

2. People with milk allergies: some people will experience abdominal pain, diarrhea and other symptoms after drinking milk, and some people with severe allergies will even have rhinitis, asthma or urticaria.

3. Patients after abdominal cavity and gastrectomy: the lactase in the patient's body will be affected and reduced, and after drinking milk, lactose will not be decomposed and will ferment in the body, producing water, lactic acid and a large amount of carbon dioxide, making the patient bloated.

Of course not, the hypothesis that milk causes cancer is a complete misreading and a far-fetched derivation process. If people only eat foods containing casein that cause cancer, then people can no longer eat meat, eggs and other foods. As long as milk is consumed in the prescribed amount under normal conditions, and when it is appropriate, people will never increase the risk of cancer because of milk consumption.

"Milk causes cancer" is an outright rumor, but it is the same as the girl's "big aunt", it comes out once in a while, and many people are scared every time.

Judging from the available scientific evidence, the probability of causing cancer by simply drinking milk is roughly equal to the probability of "winning the jackpot by buying a lottery ticket, but being struck to death by lightning on the way to receive the prize". The popularity of the "milk causes cancer" article is largely due to everyone's concern about the increasingly westernized lifestyle, which may be regarded as one of the so-called "middle-class anxieties".

That's right, obesity caused by modern overnutrition is a health killer and a real dangerous carcinogenic factor.

But it's a holistic way of life, and you can't blame a single food. If milk is nutritious and rich in protein, and drinking too much may cause obesity, so it is carcinogenic, then the same reason can be deduced that cakes are carcinogenic, steamed buns are carcinogenic, and roast duck is carcinogenic.

This is obviously ridiculous. You can choose not to drink milk, but you can't spread the rumor that milk causes cancer. It's like you can not watch the national football game, but you can't go around and say "watching the national football team will contag athlete's foot".