Lactose intolerance is caused by
A) deficiency of lactose.
B) deficiency of lactase.
C) a lack of milk in the diet.
D) a lack of a vitamin in the diet.
E) increase in dairy consumption.

Question

Quizplus · Accepted Answer

Lactose intolerance is caused by a deficiency of lactase, the enzyme that breaks down lactose in the small intestine. Without enough lactase, lactose remains undigested and causes symptoms such as bloating, diarrhea, and abdominal pain.

Lactose Intolerance Is Caused by