Cristin Kearns - Self - Dentist, Denver, Colorado 역

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

Jean-Marc Schwartz - Self - Biochemist 역

John Yudkin - Self (archive footage) 역

Ancel Keys - Self (archive footage) 역

Sami Inkinen - Self - Endurance Athlete 역

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

Terry Dean - Self - Heart and Stroke Foundation 역

Frank Lisciandro - Self - Filmmaker 역

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

Judith Hallfrisch - Self - Nutritionist 역

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

Arya Sharma - Self - Medical Director, Canadian Obesity Network 역

Kim Raine - Self - Alberta University 역

Richard Ellis - Self - McDonald's Canada 역

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

Meredith Inkinen - Self - Endurance Athlete 역