Why does someone who has lactose intolerance have gastrointestinal problems, such as abdominal distension, gas, cramping, and diarrhea?

Question

Quizplus · Accepted Answer

When someone with lactose intolerance consumes dairy products, the lactose sugar is not absorbed in the small intestine because of a deficiency in lactase, the enzyme responsible for breaking down lactose. Undigested lactose then moves into the large intestine, where it draws in water and attracts bacteria, leading to abdominal distension, gas, cramping, and diarrhea.

Why Does Someone Who Has Lactose Intolerance Have Gastrointestinal Problems