I have always felt Dr Andrew Wakefield is right about Autistic spectrum disorders - Vaccine damage and/or disorders in the gut. Thanks heavens he is still working, albeit in USA. I look forward to the day when the GMC has to apologise to him - ( I may have to wait a long time.)
I have certainly helped many children with ADHD by improving gut function as well as attention to diet.
So many children start life with the wrong bowel flora which will profoundly affect their health and mental development. Current research in to Autism and mental development proves these children can improve with nutritional programmes. Your GP may not know this.