as Self / Author

as Self / Doctor of Pediatric Endocrinology

as Self / Researcher, Okinawa Centenarian Study

as Self / Former Patient of Dr. Lustig

as Self / Dentist, Denver, Colorado

as Self / University of Ottawa

as Self / Biochemist

as Self (archival footage)

as Self (archival footage)

as Self / Endurance Athlete

as Self / Researcher, St. Michael's Hospital, Toronto

as Self / Heart and Stroke Foundation

as Self / Filmmaker

as Self / Researcher at the U.S. Department of Agriculture

as Self / Nutritionist

as Self / Head of the Tobacco Research Unit, University of CA

as Self / Medical Director, Canadian Obesity Network

as Self / Alberta University

as Self / McDonald's Canada

as Self / Faculty of Medicine, University of California

as Self / Endurance Athlete