Milk now is the word we can't live all the time. It is a rich nutrition food that allows us to grow and develop; it can also be transformed into a variety of food, to please our taste buds.
How did the culture of drinking milk first spread in the country?
In modern China, milk was first enjoyed for some people in Beijing and coastal trade areas. At the beginning of the 20th century, some foreign businessmen began to operate dairy farms in Tianjin. It is said that Meiling Song has established a dedicated dairy factory for herself. In the early period of the depression of Nanjing, Song ordered that her cows be transported to Chongqing and then shipped to Chengdu. Guangdong, Jiangsu, Zhejiang, and other coastal areas have also begun to have dairy farmers and foreign groups to open dairy plants. However, by the time of the founding of New China, China's annual per capita milk consumption was only 0.4 kg. Milk seems to have never been a necessity on the Chinese table.
After the founding of New China, the milk production gap is still large. Until 1980, the supply of milk in Beijing also took a kilogram of milk per day for infants under two years of age. The patient and the elderly proved that the milk was half a catty per day by the hospital.
In 1983, China accepted the United Nations World Food Program's “milk-free aid project”. Through this program, 90,000 tons of skimmed milk powder and 30,000 tons of anhydrous butter produced a total of millions of tons of reconstituted milk, which was mixed with fresh milk produced locally at a ratio of 30%-50%. More Chinese drink milk, although it is a "processed milk" with historical characteristics, the proportion is relatively small.
The lack of congenital lactase in Chinese people due to congenital factors is not much. Most of them are due to the lack of dairy products in the diet, which leads to the degradation of lactose into lactose intolerance.
From a genetic point of view, we can say that the Chinese people around you are all lactose intolerant.
Whether in Europe or Asia, hominids are genetic types of lactose intolerance. The high lactose tolerance is gradually evolved in the history of human milk drinking.
About 110,000 years ago, herders in West Asia domesticated dairy animals (sheep) and began using dairy products. But the lactose-tolerant gene appeared on the vast, fertile plains of Hungary about 7,500 years ago. To reduce the problem of lactose intolerance, the ancient nomads invented various fermented dairy products, such as yogurt and cheese, which were converted to lactic acid by fermentation of lactic acid bacteria.
After just a few thousand years of evolution, the proportion of lactose tolerance in Europe, North America, and the Central Asian Arabian continent has reached more than 80%. In Poland, this evolution from 0 to 80% took only 130 hours.
Why do Chinese people don't have this gene? Because we don't drink milk. Therefore, there is no such strong natural choice.
In the Neolithic Age about 10,000 years ago, ancestors from different parts of Eurasia began agricultural production and domestication of livestock. The purpose of human domestication of livestock is to obtain a stable and reliable source of food. In addition to dogs, domesticated livestock is mostly used for food.
The climate in West Asia is dry and hot, and the terrain is dominated by plateau mountains. It is suitable for animal husbandry development, and cattle and sheep have become the main livestock in West Asia. The Chinese civilization originated from the alluvial plain of the Yellow River basin of the Yangtze River. It is suitable for grain cultivation, and pigs with wider eating have become the preferred meat animals. Compared with cattle and sheep, pigs produce less milk, have shorter lactation periods, and have difficulty collecting (more nipples). They are not qualified dairy animals, and it is more cost-effective to kill meat. The cattle and buffalo that helped the farming were only to appear in the Bronze Age, and they were four or five years later than West Asia.
Having said that more than 90% of Chinese people have lactose intolerance, so why don't most people think?
First of all, because many people do not know lactose intolerance, they often use their stomachs to flatulence and run belly.
Second, it is the individual's skills are different. Many people come up with a lot of methods to drink milk. They break down the lactose before they drink it. It may also be less drink, or it may be hard in the stomach, which can be called “water”. There may also be ethnic minorities. Some ethnic minorities in the north may be horse-riding archery or the experts who catch the wolf or have lactose tolerance genes.
There are also reasons for our eating habits. The vast majority of Chinese people have been drinking milk to follow the "hidden rules" of no more than 250ml, no fasting, no ice milk. The 250ml specification happens to be the threshold for Chinese tolerate lactose. And very few people in China will drink milk on an empty stomach, and they have no habit of drinking ice milk.
The chief culprit in "drinking milk diarrhea" is not fasting, and it is often "lactose intolerance."
There is a large amount of lactose in milk. Lactose is not affected by the secretion of its milk essence. Drinking milk on an empty stomach will not cause lactose in milk, which may cause abdominal pain and diarrhea, bloating, bowel, fart.
Because of the stomach upset caused by lactose intolerance, it is not considered to be harmful to health, and at most, it affects life to a certain extent.
In general, the "congenital lactase deficiency" caused by congenital factors in China is not much. Most of them are due to the lack of dairy products in the diet during the growth process, which leads to the degradation of lactose into lactose intolerance. The patient should pay more attention to diet and choose the right product in future life.