Why does drinking milk cause diarrhea?

Answer: Some people will have bowel sounds, abdominal pain and even diarrhea after drinking milk, mainly because milk contains lactose, which needs lactase to decompose and metabolize in the body. Some people are unable to digest lactose in the intestine due to the lack of lactase in the body, which is called "lactose intolerance" in medicine. This is a normal reaction of lactase deficiency, not a quality problem of milk.

Lactase deficiency is a worldwide problem. With the increase of age, the lactase level in the body will generally decrease or even be lost, and the incidence of lactose intolerance varies from race to region. About 20% of Asians suffer from this symptom. But this symptom can be alleviated or eliminated. Just keep 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.