Do you like milk for breakfast? Milk is rich in nutrition. It's not necessary to say that it's good for human body. Many people like to drink a cup of milk for breakfast to supplement all kinds of nutrients needed in the body. But what is it about that some people have diarrhea as soon as they drink pure milk? Is it allergic to milk?
Not allergy
Many people have this saying: 'I can't drink milk. I'm allergic to milk and have diarrhea as soon as I drink it'. In fact, the vast majority of them are not allergic to milk, but do not absorb lactose in milk. We should know that the so-called "allergy" usually has symptoms such as itching, redness or asthma. When they drink milk or milk powder, they will have abdominal distention and diarrhea, which is called lactose intolerance.
What is lactose?
Lactose is a kind of disaccharide, which widely exists in the milk of mammals. About 4.5g lactose per 100ml of 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.
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 milk, diarrhea, abdominal distention or stomach discomfort are generally due to the lack of a digestive enzyme called lactase. The milk they drink has a lot of lactose, but they don't have lactase, lactose can't be decomposed and absorbed, and 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 milk soon to run toilet.
Lactose intolerance varies from person to person
If you drink the same cup of milk, some people are OK at all, while some people have severe diarrhea, which shows that lactose intolerance is also a big individual difference. Whether lactose intolerance will occur or not is largely determined by genes. If the body does not produce lactase, it is likely that he will suffer from 'drinking milk and diarrhea'. But not absolutely. The improvement of lactose intolerance in the day after tomorrow can also make up for it to a great extent. Some people who drink milk often 'wake up the sleeping lactase', and drink it will be tolerated by milk. According to modern medical research, lactase is produced in human body only in childhood. If there is no or little contact with 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 milk are less exposed to milk and other dairy products after weaning, resulting in the 'degradation' of lactase. The habit of drinking milk is quite common in Europe and America. In early childhood, people in Europe and America are basically exposed to dairy products, so there is less lactose intolerance in Europe and America.
How to do it?
Replace with lactose free dairy products
Milk itself is a good thing. It's a pity to abandon milk because of intolerance. For those who drink milk with diarrhea, they can choose some lactose free dairy products instead, such as yogurt, cheese, etc. Yoghurt is produced by fermentation after milk is added with Lactobacillus. The fermentation process makes lactose in raw milk decompose into lactic acid, protein and fat also decompose into small components, calcium, iron, zinc and other minerals beneficial to human body are also dissociated from large molecules, making it easier to digest and absorb. There are also products developed for lactose intolerant people on the market. These milk remove lactose, and other ingredients remain the same as milk but do not have diarrhea.
Change the way you drink milk
Changing the way of drinking milk can also reduce the symptoms of lactose intolerance, such as not drinking milk on an empty stomach, eating it together 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 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 milk can be 'diluted', reducing the stimulation of high concentration lactose on the intestinal tract. 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.