Vinnie Tortorich

as Self / Narrator / Producer

Eric Westman

as Self / Professor, Duke Univ. / Author / Internal Medicine Dr.

Gary Taubes

as Self / Investigative Journalist / Author / NuSI

Nina Teicholz

as Self / Science Journalist / Author / Nutrition Coalition

Bret Scher

as Self / Cardiologist

Andreas Eenfeldt

as Self / Medical Doctor

Drew Pinsky

as Self / Internist / Addicitionologist

Dr. Dean Ornish

as Self (Archival Footage)