Lactose intolerance is a common complaint, particularly with younger adults and children. This digestive disorder makes it hard for your body to process lactose, found in milk and dairy products. Since your body can’t digest lactose properly, it starts to ferment in the stomach.

1. Don’t Mistake It for an Allergy

Someone with a food allergy experiences an allergic reaction if they eat even the slightest amount of the trigger food. Someone with lactose intolerance can eat or drink a certain amount of milk products without ill effects. The exact quantity of milk-sourced foods a person can eat varies and becomes clear with experience. Tolerance levels also change with age.