A large number of studies show that the long-term harm of cancer in developed countries is rooted in the "high calorie, high fat and high protein" diet.

high calorie. The whole raw material composition of "western fast food characteristics" is characterized by high calorie. For example, the bread base material is high-precision white flour, because of the high processing precision, most of the nutritional and health-care components in the raw wheat grain that are beneficial to the human body are lost. According to the scientific theory that the nutritional value of flour is inversely proportional to the processing accuracy, the key physiological effect of white flour in the base material of "foreign fast food" on human body lies in the problem of "heat". The history of human nutrition shows that people who overeat for a long time are prone to coronary heart disease, diabetes, arteriosclerosis and myocardial infarction.

high fat. "The frying process in the characteristics of western-style fast food makes a lot of fat run into food, which makes the fat content of food suddenly increase. The original fat content of potatoes is less than 1%, but the fat content can reach about 4% after frying because of the large expansion of potatoes. However, some animal fats in "foreign fast food" are mainly saturated fatty acids and contain more cholesterol, which is easy to deposit on the blood vessel wall and lead to arteriosclerosis and hypertension.

western fast food with high protein is characterized by consuming animal meat such as beef. Meat is characterized by high protein, high calorie and high fat. Excessive consumption has great side effects on human body, especially beef. Among the "three high" foods, beef consumption is a pollution source with great carcinogenic effect.

in recent years, the United States has vigorously promoted healthy foods: whole wheat flour, whole grains and soybeans, and has introduced relevant management measures. However, the "three high" fast food is still "repeatedly banned", mainly because the typical mode of "three high" diet is in tune with the modern fast-paced life and can meet the consumption psychology of modern people.

In addition, our traditional diet in China is actually relatively healthy. But there are several things that are not enough. One is folic acid, because China is used to cooking vegetables and eating them, so folic acid will lose 9%. If you want to supplement folic acid (especially pregnant women), you can eat salad and kiwi fruit. There are also folic acid tablets for pregnant women (be careful not to use medicinal folic acid tablets casually unless there are symptoms of deficiency, which is very high). The second is calcium, which can be supplemented by drinking more milk. The third is zinc, which is more in meat and grains.

that's what we talked about in our university nutrition class.

It is suggested that the landlord eat more home-cooked food and eat less fast food outside.