This article concludes that children with autism on casein- and gluten-free diets are receiving approximately the same nutrition as children with autism not on elimination diets.

This study focused on 37 children with autism; 8 were on gluten- and casein-free diets, and 29 were not. The parents of these children completed questionnaires about the diets of their children. The results showed no significant differences between the dietary intakes of the two groups. However, children on the casein- and gluten-free diets were more likely to be deficient in calcium, copper, iron, and zinc. The authors commented that children on the elimination diets ate more fruits and vegetables than the children on non-elimination diets.