For most of the world's population, what is the effect of aging on the activity of lactase?

Question

Quizplus · Accepted Answer

For most of the world's population, the activity of lactase declines by 90-95 percent as they age. This is known as lactase non-persistence or lactose intolerance. Only a small percentage of the population, particularly those of European descent, retain high lactase activity into adulthood, known as lactase persistence.

For Most of the World's Population, What Is the Effect