<<Disclaimer: Verify this information before applying it to your situation.>> Just reading my new issue of the Autism Research Review Int'l. There's a publication by the Univ. of Rome - "Abnormal Intestinal Permeability in Children With Autism" in which 9 of the 21 autistic children tested had an altered intestinal permeability, while none of the 40 controls did. They concluded that "an altered intestinal permeability could represent a possible mechanism for the increased passage through the gut mucosa of peptides derived from foods, with subsequent behavioral abnormalities."