Carbohydrate intolerance can be primary or secondary.

Carbohydrate intolerance can be diagnosed using oral tolerance tests.

With good dietary management, individuals with carbohydrate intolerance can lead normal lives.

Lactose is a simple carbohydrate and typically is the reason for milk intolerance in people. Lactose is a simple sugar/carbohydrate.

Since the cause of the enzyme deficiency leading to carbohydrate intolerance is unknown, there is no way to prevent this condition.