Question

Why lactose non persistence individual tolerate more yogurt?

Answer 1

Lactose intolerance is a deficit in the ability to digest lactose, and is due to a relative lack of the lactase enzyme in the small intestine.

Milk is rich in lactose (roughly 40 grams/liter for cow's milk), which serves as the major carbohydrate energy source for infants and young animals. However, dietary lactose cannot be absorbed intact. Rather, it must be hydrolyzed into its constituent monosaccharides glucose and galactose to allow transport across the epithelium. This hydrolysis is dependent upon lactase, a brush border enzyme in epithelial cells in the small intestine.