Pure milk has rich nutritional value. Many people like pure milk very much. Drinking pure milk can improve the body's immunity, promote the body's development and bone growth, but many people will have diarrhea as soon as they drink pure milk. Do you know what's going on?
1、 It's not allergies
Many people have this saying: 'I can't drink pure milk. I'm allergic to pure milk and have diarrhea as soon as I drink it'. In fact, the vast majority of them are not allergic to pure milk, but do not absorb the lactose in pure milk. You should know that the so-called 'allergy' usually has symptoms such as itching, redness or asthma. When they drink pure milk or milk powder, they will have abdominal distention and diarrhea, which is called lactose intolerance.
2、 What is lactose?
Lactose is a kind of disaccharide, which widely exists in the milk of mammals. About 4.5g lactose per 100ml of pure milk. Lactose can be absorbed only after it is broken down into glucose and galactose by lactase in human small intestine. In fact, we can decompose lactose at birth, but later the content of the enzyme that decomposes lactose began to decrease gradually, so that it could not decompose lactose when growing up, causing lactose not to be absorbed.
3、 What is lactose intolerance?
Lactose intolerance is simply that lactose can not be decomposed and absorbed in the small intestine, resulting in lactose entering the large intestine, resulting in high intestinal osmotic pressure, water can not be absorbed, resulting in diarrhea. Its principle is similar to cathartic. For people who drink pure milk and have diarrhea or abdominal distension, they are generally lack of a digestive enzyme called lactase. Drinking pure milk has a lot of lactose, but they do not have lactase, lactose can not be decomposed and absorbed, a lot of undigested lactose reaches the large intestine. Some bacteria in the large intestine ferment with lactose and produce a lot of gas, which will cause abdominal distention, diarrhea, farting and other symptoms. Lactose intolerant light abdominal distension, heavy drink pure milk soon to run toilet.
4、 Lactose intolerance varies from person to person
If you drink the same cup of pure milk, some people are OK at all, while others have severe diarrhea, which shows that lactose intolerance is also a big individual difference. Whether lactose intolerance will occur is largely determined by genes. If the body does not produce lactase, it is likely that he will have diarrhea by drinking pure milk. But it's not absolute. The improvement of lactose intolerance in the day after tomorrow can make up for it to a great extent. Some people who drink pure milk often 'wake up the sleeping lactase', and drink it will be tolerated by pure milk. According to modern medical research, lactase is produced in human body only in childhood. If there is no or little contact with pure milk and lactose food in the early stage, lactose intolerance is very likely to occur with the growth of age. It is suggested that people who are prone to abdominal distention, diarrhea and indigestion after drinking pure milk have less contact with pure milk and other dairy products after weaning, resulting in the 'degradation' of lactase. The habit of drinking pure milk is quite common in Europe and America, and people in Europe and America are basically exposed to dairy products in childhood, so there is less lactose intolerance in Europe and America.
5、 Replace with lactose free dairy products
Pure milk itself is a good thing. It's a pity to abandon pure milk because of intolerance. For those who drink pure milk and have diarrhea, they can choose some dairy products without lactose, such as yogurt, cheese, etc. Yoghurt is produced by fermentation after pure milk is added with Lactobacillus. During the fermentation process, lactose in raw milk is decomposed into lactic acid, protein and fat are also decomposed into small components, calcium, iron, zinc and other minerals beneficial to human body are also separated from large molecules, making it easier to digest and absorb. There are also products developed for lactose intolerant people on the market. These pure milk remove lactose, and other ingredients remain the same as pure milk, but do not have diarrhea.
6、 Change the way you drink pure milk
Changing the way of drinking pure milk can also reduce the symptoms of lactose intolerance, such as not drinking pure milk on an empty stomach, eating it with other foods, a small amount of multiple times, etc. Lactose intolerant people who drink milk on an empty stomach will have more serious symptoms, because the lactose concentration of pure milk is relatively high when they drink on an empty stomach, but when they drink some bread, cereal and other foods, the lactose concentration of pure milk can be 'diluted', reducing the stimulation of high concentration lactose on the intestine. For example, eating biscuits and bread before or during milk can reduce symptoms. In addition, if you drink milk powder, do not soak it too thick, or it will easily lead to diarrhea.