As a mom whose Asperger's son is now grown, I wanted to share that studies give some info on what's possible, but studies DON'T apply to individual children. We dealt with common & uncommon food allergies from birth, environmental allergies, medications & side effects, & struggles getting appropriate educational supports (Asperger's wasn't a diagnosis yet!) & lots of problems with Anxiety!! I would like to remind everyone of the connection between emotions & gut activity. Stress is going to affect gut activity, & I can't think of anything more stressful than struggling with autism. I eventually had to tell all the experts I dealt with that I had to live with the reality of the situation, & I was always going to go with what worked for me & my child. Agreement with 'science' wasn't important. Good Luck to you all.