Sami Inkinen
Self / Endurance Athlete
Gary Taubes
Self / Author
Robert Lustig
Self / Doctor of Pediatric Endocrinology
Arya Sharma
Self / Medical Director, Canadian Obesity Network
Frank Lisciandro
Self / Filmmaker
Ancel Keys
Self (archival footage)
Cristin Kearns
Self / Dentist, Denver, Colorado
Yoni Freedhoff M.D.
Self / University of Ottawa
Jean-Marc Schwartz
Self / Biochemist
Dr. John L. Sievenpiper
Self / Researcher, St. Michael's Hospital, Toronto
Craig Wilcox
Self / Researcher, Okinawa Centenarian Study
Alexis Gomez
Self / Former Patient of Dr. Lustig
John Yudkin
Self (archival footage)
Terry Dean
Self / Heart and Stroke Foundation
Sheldon Reiser
Self / Researcher at the U.S. Department of Agriculture
Judith Hallfrisch
Self / Nutritionist
Stan Glantz
Self / Head of the Tobacco Research Unit, University of CA
Kim Raine
Self / Alberta University
Richard Ellis
Self / McDonald's Canada
Meredith Inkinen
Self / Endurance Athlete
Laura Schmidt
Self / Faculty of Medicine, University of California