Jim Abrahams
Self - Father / Founder, Charlie Foundation / Filmmaker
Vinnie Tortorich
Self - Narrator / Producer / Trainer / Author
Bret Scher
Self - Cardiologist
Gary Taubes
Self - Journalist / Author
D
Dave Feldman
Self - Software Engineer
Eric Westman
Self - Internal Medicine Doctor
A
Andreas Eenfeldt
Self - Physician
Drew Pinsky
Self - Physician
Georgia Ede
Self - Psychiatrist
N
Nina Teicholz
Self - Journalist
V
Vilhjalmur Stefansson
Self - Explorer (archive footage)
I
Ivor Cummins
Self - Biochemical Engineer
A
Ancel Keys
Self (archive footage)
Jeffry Gerber
Self - Physician
George McGovern
Self - Politician (archive footage)
G
Gary Fetke
Self - Orthopaedic Surgeon