Vinnie Tortorich
— Self / Narrator / Producer
Eric Westman
— Self / Professor, Duke Univ. / Author / Internal Medicine Dr.
Gary Taubes
— Self / Investigative Journalist / Author / NuSI
Nina Teicholz
— Self / Science Journalist / Author / Nutrition Coalition
Bret Scher
— Self / Cardiologist
Andreas Eenfeldt
— Self / Medical Doctor
Drew Pinsky
— Self / Internist / Addicitionologist
Dr. Dean Ornish
— Self (Archival Footage)
Jeffry Gerber
— Self / Family Physician
Georgia Ede
— Self / Psychiatrist