Patient's question:
Why do I get diarrhea every time I drink milk? Recently, I bought a box of Yili Nutritional Milk and had diarrhea twice after drinking it twice. What could be the reason?Past treatment history and effectiveness: Whole milk also causes this, but I never have diarrhea with sour milk or yogurt.
What kind of help do you need: How should I treat it?
Doctor's answer:
Dear patient, it is a pleasure to clarify your questions. Milk contains a unique substance called lactose. Under normal circumstances, lactose is digested and absorbed in the small intestine with the help of lactase. However, as age increases, the activity of lactase gradually declines. If milk is consumed, lactose cannot be broken down and remains in the large intestine, where it is fermented, producing water, carbon dioxide, and lactic acid. Lactic acid is not metabolized by the human body, leading to abdominal pain, nausea, and vomiting.