As a clinician at the University of Missouri Thompson Center for Autism and Neurodevelopmental Disorders, David Beversdorf helps patients with autism spectrum disorder (ASD), many of whom may also be struggling with gastrointestinal or digestive issues, including constipation and diarrhea. These symptoms are experienced by children with ASD at a higher rate than their neurotypical peers, although some individuals might not respond favorably to traditional treatments, such as laxatives.