William Walsh, PhD, is founder of the Health Research Institute and Pfeiffer Treatment Center in Warrenville, IL. His scientific interest has focused on biochemical disorders and their affect on behavior. The non-profit Center has provided individualized nutrient therapy to more than 14,000 patients with behavior disorders, attention-deficit hyperactivity disorder (ADHD), learning problems, autism, depression, and schizophrenia. Dr. Walsh has authored more than 200 scientific articles and reports. He presently serves as chief scientist of the Walsh Research Institute. See related research here.