Some people drink milk in life, which can lead to abdominal pain and diarrhea. The reasons for this phenomenon are complicated, and sometimes it is because milk is not well preserved. Therefore, consumers are advised to drink it as soon as possible after opening a can of milk, and not to be exposed to the air for too long. More often, it is caused by "lactose intolerance", which refers to the lack of lactase that decomposes lactose in the human body.
There is some lactose naturally in milk, which can't be absorbed through the gastrointestinal tract and reaches the large intestine intact. There are all kinds of bacteria in the large intestine, some of which can metabolize lactose. This metabolism is a microbial fermentation process, which will produce a lot of gases, such as hydrogen, carbon dioxide and methane. The massive production of these gases will lead to stomach and abdomen colic, nausea, abdominal distension, acid reflux and flatulence.
Extended data:
About 50% people in the world suffer from lactose intolerance, and the proportion of Asians is much higher than that of Europeans and Americans. The number and activity of lactase in most babies reach the peak in the first few days after birth. By the age of six or seven, about 10% of children have lactose intolerance, and about 40% of people have lactose intolerance after the age of 30.
People who are lactose intolerant can eat yogurt instead, because 20%-30% of lactose in yogurt has been degraded and is easy to digest and absorb. You can also quote low lactose milk.
As early as the 1980s, scholars began to study the lactose intolerance of China residents. Many investigations and studies in the past decades have found that the proportion of lactose intolerance among adults in China is mostly over 90%, and even in ethnic minority areas in the northwest, the probability of lactose intolerance is about 80%.
References:
People's network-the reason for drinking milk and having loose bowels