Self / Investigative Science Journalist / Author
Gary Taubes
Self / Investigative Science Journalist / Author
Nina Teicholz
Self (Archival footage) / Physiologist
Ancel Keys
Self / Scientist / Author / Professor Emerita
Tim Noakes
Self / Narrator / Nutritionist / Functional Medicine Physician
Mark Hyman
Self / Cardiologist
Bret Scher
Self / Obesity Specialist
Sarah Hallberg
Self / Obesity Researcher
Zoe Harcombe
Self / Cardiologist
Salim Yusuf
Self / Pediatric Endocrinologist
Robert Lustig
Self / Diabetes Specialist
Jason Fung
Self (Archival footage) / Comedian
Bill Maher
Self / Obesity Specialist
Eric Westman
Self / Certified Nutritionist
Jonny Bowden
Self (Archival footage) / President
Dwight D. Eisenhower
Self / Certified Diabetes Educator
Alyssa Gallagher
Self / US Army Pilot
Brian Gaudette
Self / Internal Medicine Physician
Brian Lenzkes
