Gary Taubes

Self - Author

Robert Lustig

Self - Doctor of Pediatric Endocrinology

Craig Wilcox

Self - Researcher, Okinawa Centenarian Study

Alexis Gomez

Self - Former Patient of Dr. Lustig

Cristin Kearns

Self - Dentist, Denver, Colorado

Yoni Freedhoff M.D.

Self - University of Ottawa

Jean-Marc Schwartz

Self - Biochemist

John Yudkin

Self (archive footage)

Ancel Keys

Self (archive footage)

Sami Inkinen

Self - Endurance Athlete

Dr. John L. Sievenpiper

Self - Researcher, St. Michael's Hospital, Toronto

Terry Dean

Self - Heart and Stroke Foundation

Frank Lisciandro

Self - Filmmaker

Sheldon Reiser

Self - Researcher at the U.S. Department of Agriculture

Judith Hallfrisch

Self - Nutritionist

Michèle Hozer