Himself David D. Perlmutter

Himself Tim Noakes

Himself Andreas Eenfeldt

Himself Jimmy Moore

Himself Gary Taubes

Self Lathe Poland

Self Jonathan Bailor

Self Jonny Bowden

Self Kashia Cave

Self 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.

Narrator Eric Carlsen

Nurse Gisela Carlsen

Dr. K. Lulis Daniel Damiano

Self Elyssia Poland

Thomas Willis Daniel Riffe