演职人员
Self - Father / Founder, Charlie Foundation / Filmmaker
吉姆·亚伯拉罕斯
Self - Narrator / Producer / Trainer / Author
Vinnie Tortorich
Self - Cardiologist
Bret Scher
Self - Journalist / Author
Gary Taubes
Self - Software Engineer
Dave Feldman
Self - Internal Medicine Doctor
Eric Westman
Self - Physician
Andreas Eenfeldt
Self - Physician
Drew Pinsky
Self - Psychiatrist
Georgia Ede
Self - Journalist
Nina Teicholz
Self - Explorer (archive footage)
Vilhjalmur Stefansson
Self - Biochemical Engineer
Ivor Cummins
Self (archive footage)
Ancel Keys
Self - Physician
Jeffry Gerber
Self - Politician (archive footage)
George McGovern
Self - Orthopaedic Surgeon
Gary Fetke