| Person | Type | Job | Role(s) |
|---|---|---|---|
 Janice Dawe | Crew | Production | Producer |
Michèle Hozer | Crew | Directing | Director, Producer |
Neville Ottey | Crew | Camera | Camera Operator |
 David Draper | Crew | Sound | Sound |
Roxana Spicer | Crew | Writing | Writer |
Russell Walker | Crew | Sound | Music |
Jan Rofekamp | Crew | Production | Producer |
 Gary Taubes | Cast | Actor | Self / Author |
 Robert Lustig | Cast | Actor | Self / Doctor of Pediatric Endocrinology |
 Sami Inkinen | Cast | Actor | Self / Endurance Athlete |
Arya Sharma | Cast | Self / Medical Director, Canadian Obesity Network | |
Frank Lisciandro | Cast | Self / Filmmaker | |
 Ancel Keys | Cast | Self (archival footage) | |
Cristin Kearns | Cast | Self / Dentist, Denver, Colorado | |
Yoni Freedhoff M.D. | Cast | Self / University of Ottawa | |
Jean-Marc Schwartz | Cast | Self / Biochemist | |
Dr. John L. Sievenpiper | Cast | Self / Researcher, St. Michael's Hospital, Toronto | |
Craig Wilcox | Cast | Self / Researcher, Okinawa Centenarian Study | |
Judith Hallfrisch | Cast | Self / Nutritionist | |
Terry Dean | Cast | Self / Heart and Stroke Foundation | |
 John Yudkin | Cast | Actor | Self (archival footage) |
Kim Raine | Cast | Self / Alberta University | |
Stan Glantz | Cast | Self / Head of the Tobacco Research Unit, University of CA | |
Richard Ellis | Cast | Self / McDonald's Canada | |
Alexis Gomez | Cast | Self / Former Patient of Dr. Lustig | |
Sheldon Reiser | Cast | Self / Researcher at the U.S. Department of Agriculture | |
Meredith Inkinen | Cast | Self / Endurance Athlete | |
| Person | Type | Job | Role(s) |
