Answer: Some people will have bowel sounds, abdominal pain and even diarrhea after drinking milk, mainly because milk contains lactose, which needs the participation of lactase in the decomposition and metabolism of lactose in the body. Some people can't digest lactose in the intestine because of the lack of lactase in the body, resulting in discomfort, which is called "lactose intolerance" in medicine. This is a normal reaction of lack of lactase, not a quality problem of milk.

Lactase deficiency is a worldwide problem. Lactase levels in the body generally decrease or even lose with age, and the incidence of lactose intolerance varies with race and region. About 20% of Asians suffer from this symptom. But this symptom can be alleviated or eliminated. As long as you insist on drinking, drink less every time, change from less to more, and don't drink on an empty stomach. Over time, it can promote the production of lactase and improve the symptoms of lactose intolerance. In addition, you can also eat dairy products such as cheese, yogurt or low-lactose milk to absorb nutrients such as protein in milk.