Question: what is the difference between a person who is lactose persistence and lactose intolerant?
Answer: Lactase persistence, the ability to drink milk as an adult and the opposite of lactose intolerance, is a trait that arose in humans as a direct result of our domestication of other mammals. Lactose is the main carbohydrate (disaccharide sugar) in animal milk, including humans, cows, sheep, camels, horses, and dogs.