Paul Shattock is a British autism researcher and scientific consultant to the charity Education and Services for People with Autism, of which he is also the founder. He was formerly the director of the Autism Research Unit at the University of Sunderland. He is well known for his disputed research into dietary therapy and autism, having claimed that autistic children may have a "leaky gut" which allows certain peptides to enter the bloodstream, and claimed that they excrete unusually high levels thereof. As a result of this speculation, he has promoted the use of a gluten-free, casein-free diet to ameliorate the symptoms of autism, a theory he developed along with Kalle Reichelt. In addition, he has claimed that a protein found in milk may play a role in the etiology of autism. He is also the former president of the World Autism Organization.