Which of the following statements is true regarding lactose tolerance?
A) Lactose intolerance is common in many parts of the world.
B) Lactose intolerance is found only among Asian populations.
C) Lactose tolerance is a result of acclimatization to dairy products in childhood.
D) Lactose tolerance is based on access to westernized medical care.

Question

Quizplus · Accepted Answer

Lactose intolerance is common in many parts of the world, including Asia, Africa, and South America. It is estimated that up to 75% of adults worldwide are lactose intolerant to some degree. This is due to a decrease in lactase production, the enzyme needed to break down lactose, after weaning. However, in some populations, such as those of European descent, lactose tolerance has evolved due to a natural selection advantage in consuming dairy products. Acclimatization to dairy products in childhood or access to westernized medical care are not factors in lactose tolerance.

Which of the Following Statements Is True Regarding Lactose Tolerance