1. Some people have vomiting and diarrhea after drinking milk. This is often due to lactose intolerance. It is recommended not to drink it anymore.

2. Milk contains 4%-5% lactose, which is very conducive to the proliferation of beneficial bacteria in the intestines and can also promote the absorption of minerals.

3. After not drinking milk for many years, some people’s ability to absorb lactose may decrease. After drinking milk again, lactose will irritate the intestines, causing bacteria to multiply in the large intestine, causing flatulence or bloating. In severe cases, it may lead to diarrhea.