- Ann Cooper - Self
- Andrea DiMauro - Self
- Yoni Freedhoff M.D. - Self
- Jeffery Gerber M.D. - Self
- Jacqueline Gjurgevich - Self
- Stephan Guyenet M.D. - Self
- Adele Hite MPH R.D. - Self
- Sami Inkinen - Self
- Meredith Loring - Self
- David L. Katz - Self
- Rick Lindquist - Self
- Marion Nestle - Self
- Jennifer Phelps M.D. - Self
- Marlene Schwartz PHD - Self
- Wendy Scinta M.D. - Self
- Mark Sisson - Self
- Christine Straley - Self
- Ronald Tamler M.D. - Self
- Melanie Warner - Self
- Brian Wansink M.D. - Self
- Eric Carlsen - Narrator
- Gisela Carlsen - Nurse
- Daniel Damiano - Dr. K. Lulis
- Elyssia Poland - Self
- Daniel Riffe - Thomas Willis
- Eric Carlsen
- Lathe Poland
- Eric Carlsen
- Lathe Poland
Capítulo disponible en las siguientes plataformas: