Our physical structures naturally produce Melatonin. In Autistic children the amount of Melatonin produced is not sufficient. They have issues sleeping in the evening. Night after night of too little sleep can really take a toll on an Autistic child. They can have more unwanted behaviors. If a child is not sleeping, more often than not the mum or dad is not sleeping either. This can make for a terribly grouchy child and mother or father. Setting up the day tired can ruin the entire day. Their child will not want to cooperate with you or anyone else. This can make therapy or physicians appointments very unpleasant.