When I was researching digestive enzymes for ds, I found several posts by MDC mamas who were able to re-introduce casein and gluten while using the right enzymes. Previously these children had severe reactions. If your child has celiac, I don't think gluten with enzymes is recommended. But if it's a gluten sensitivity, I know that some others have overcome it using enzymes. From what I've been reading, Houston's Peptizyde is the best for both gluten and casein.