Lactose is a disaccharide found in milk. What makes some people "lactose intolerant" as adults?

Question

Quizplus · Accepted Answer

Lactose-intolerant people don't produce adequate amounts of lactase, which is the enzyme required to break down lactose into simple sugars that can be absorbed by the body. Without enough lactase, lactose passes through the digestive system intact, leading to uncomfortable symptoms such as bloating, gas, and diarrhea.

Lactose Is a Disaccharide Found in Milk