Most Asian adults drink little or no milk and seldom eat dairy products. The primary reason is

A) a cultural taboo against dairy products.
B) genetic difference in the taste buds from non-Asians.
C) a lack of availability of dairy products in most Asian countries.
D) genetic differences in digestion.

The primary reason most Asian adults drink little or no milk and seldom eat dairy products is due to genetic differences in digestion, specifically lactose intolerance. Many people of Asian descent have a reduced ability to digest lactose, a sugar found in milk and dairy products, because they produce less of the enzyme lactase, which is needed to digest lactose, after childhood. This can lead to discomfort, bloating, and other symptoms when consuming dairy, leading to a lower consumption of these products.