Well I can tell you what I know...
My 4 1/2 yr old son has autism. He goes to a special dr and she's put him on a gluten free casein free diet. His body doesn't digest the gluten (wheat products) so it lays in his gut. Then it leaks thru his intestines and gets into the bloodstream. (Leaky gut). The blood goes up into the brain and actually causes a morphine effect. Tht's why a lot of kids w/ autism spin in circles or hand flap, etc. They are basically high! And of course it's very addictive, the foods they crave are the foods they shouldn't be eating!!
If this helps.great.!! I'd be more than happy to share more if this is the sort of information you're looking for....
-Thanks, Kim