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)