How can I know if my child is lactose intolerant? How do I know which cheeses and yogurts don't have lactose?

Lab Tests or Symptom. Your child's doctor can run lactose-intolerance tests. However, the easiest way may be to remove lactose-containing foods/beverages from the child's diet and see if their symptoms improve. I'm afraid all cheeses and yogurts contain lactose. There are some speciality milks that are lactose free. However, if your child is lactose-intolerant, there is no need to have dairy in their diet.