Character Name : Self - Father / Founder, Charlie Foundation / Filmmaker

Original Name : Jim Abrahams

Gender : Male

Character Name : Self - Narrator / Producer / Trainer / Author

Original Name : Vinnie Tortorich

Gender : Male

Character Name : Self - Cardiologist

Original Name : Bret Scher

Gender : Male

Character Name : Self - Journalist / Author

Original Name : Gary Taubes

Gender : Male

Character Name : Self - Software Engineer

Original Name : Dave Feldman

Gender : Male

Character Name : Self - Internal Medicine Doctor

Original Name : Eric Westman

Gender : Male

Character Name : Self - Physician

Original Name : Andreas Eenfeldt

Gender : Male

Character Name : Self - Physician

Original Name : Drew Pinsky

Gender : Male

Character Name : Self - Psychiatrist

Original Name : Georgia Ede

Gender : Male

Character Name : Self - Journalist

Original Name : Nina Teicholz

Gender : Female

Character Name : Self - Explorer (archive footage)

Original Name : Vilhjalmur Stefansson

Gender : Male

Character Name : Self - Biochemical Engineer

Original Name : Ivor Cummins

Gender : Male

Character Name : Self (archive footage)

Original Name : Ancel Keys

Gender : Male

Character Name : Self - Physician

Original Name : Jeffry Gerber

Gender : Male

Character Name : Self - Politician (archive footage)

Original Name : George McGovern

Gender : Male

Character Name : Self - Orthopaedic Surgeon

Original Name : Gary Fetke

Gender : Male