Some children with autism appear to respond to a gluten-free or casein-free diet. Gluten is found in foods containing wheat, rye, and barley. Casein is found in milk, cheese, and other dairy products.

Not all doctors agree that dietary changes will make a difference, and not all studies of this method have shown positive results.

If you are considering these or other dietary changes, talk to both a doctor who specializes in the digestive system (gastroenterologist) and a registered dietitian. You want to be sure that the child still has a balanced diet.