Milk cause cancer? No sufficient evidence 
 
 
The 2015-06-09 13:54:56 | source: Beijing 

     only with food 

    Events: the recent "the milk of cancer" and spread in the circle of friends, say American scientists found that the hormones in milk IGF - 1 is a kind of carcinogenic factors, will lead to female breast cancer, men for prostate cancer; Too much at the same time, the protein in milk, especially the casein, excess protein can increase cancer, heart disease, diabetes, kidney stones, such as osteoporosis, high blood pressure risk. 
 
    Milk of IGF 1 full name is "kind of insulin-like growth factor I", it is one of the types of organisms secrete hormone protein, to human body blood sugar control, the important role in the growth and development. In fact, the human body itself also contains the hormone, an adult daily generation in the body of ten million grams, and IGF 1 in milk only about 2.45 ng/ml, far less than the amount of the body. There are some epidemiological survey, IGF 1 seemed to have a certain relationship with prostate cancer and other cancers. But the FDA, the world health organization, the United Nations food and agriculture organization (fao) jecfa assessment is believed that the relationship between IGF 1 and cancer is a kind of multiple factors, and so far there is no evidence that it is the cause of the cancer. 
 
    As for milk casein carcinogenic, first from Cornell university professor colin Campbell a "rat" experiment, rats were given carcinogenic aflatoxin, respectively fed soybean protein or casein (as the sole source of protein), result eat casein rat liver cancer number more than eating soy protein in rats. But in the process of spread, people will often used in the experiment of this carcinogen aflatoxin ignored. Aflatoxin is strong carcinogens, and the source of dietary protein is a variety of people, can't eat only one kind of protein. If there were no carcinogenic substance, both in casein and soybean protein does not cause cancer in rats. So that neither implied in the experiment conclusion casein can be carcinogenic, the experimental results also does not apply to people. 
 
    So, can lead to excessive protein drink milk? According to the Chinese nutrition society in 2013 recommended amount of protein intake of residents in our country released adult male need about 65 grams per day, adult women 55 grams. According to this standard, even if a 500 ml of milk a day, from milk intake to only about 15 grams of protein, far from recommended, excessive worry about drinking milk protein is totally unfounded. And even worry too much, also should be the overall diet control, such as reducing red meat intake, etc. 
 
    Cancer institute, the world cancer research fund and the United States in 2007, jointly issued the experts on diet, nutrition, physical activity and cancer risk assessment, including the study of milk and dairy products and cancer risk conclusion is: there is no enough convincing evidence that milk have increased or reduced the risk of cancer, but the milk may have the effect of reducing the risk of colon cancer; And high calcium diet, both from milk and other food, may have the effect of the increased risk of prostate cancer. How many belong to high calcium intake? Report the amount of tip is 1.5 g/day, and adults daily recommendation is about 1 gram of residents in our country, as long as it's not a lot of taking calcium supplements, by drinking milk to the amount of 1.5 g/day, need to drink more than one litre of milk a day, most Chinese is difficult to achieve. 
 
    In fact, the world health organization recommended people more than to drink a cup of milk every day. The Chinese residents' dietary guidelines suggest drinking milk 300 grams per day, conditional drink to 500 grams. The United States department of agriculture recommended dietary guidelines recommend three cups of milk a day, harvard school of public health advice one or two glasses of milk every day. But the reality is that China's per capita annual intake of milk is only 8 kg, 22 ml per person a day, far below the recommended; In the vast rural and remote areas, a lot of people has no consumption of milk. 
 
RuanGuangFeng (division of food and nutrition information exchange center, deputy director of the)