Gary Taubes as Self - Author

Robert Lustig as Self - Doctor of Pediatric Endocrinology

Craig Wilcox as Self - Researcher, Okinawa Centenarian Study

Alexis Gomez as Self - Former Patient of Dr. Lustig

Cristin Kearns as Self - Dentist, Denver, Colorado

Yoni Freedhoff M.D. as Self - University of Ottawa

Jean-Marc Schwartz as Self - Biochemist

John Yudkin as Self (archive footage)

Ancel Keys as Self (archive footage)

Sami Inkinen as Self - Endurance Athlete

Dr. John L. Sievenpiper as Self - Researcher, St. Michael's Hospital, Toronto

Terry Dean as Self - Heart and Stroke Foundation

Frank Lisciandro as Self - Filmmaker

Sheldon Reiser as Self - Researcher at the U.S. Department of Agriculture

Judith Hallfrisch as Self - Nutritionist

Stan Glantz as Self - Head of the Tobacco Research Unit, University of CA

Arya Sharma as Self - Medical Director, Canadian Obesity Network

Kim Raine as Self - Alberta University

Richard Ellis as Self - McDonald's Canada

Laura Schmidt as Self - Faculty of Medicine, University of California

Meredith Inkinen as Self - Endurance Athlete