Many autistic children have abnormal bowel function. This may vary from constipation to diarrhoea.
Poor gastric motility,
Overgrowth of pathogenic [harmful] bacteria, candida species or assorted parasites,
Inability to break down some dietary proteins
In most autistic children regulation of bowel habit brings clinical improvement and probably the most effective way of doing this is by introducing a gluten free casein free diet.
In a survey of parents of 24,578 autistic children, 63% made clear clinical improvement following withdrawal of gluten and casein.