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Leading health experts examine the history of the U.S. Dietary Guidelines and question decades of dietary advice insisting that saturated fats are bad for us.

Gary Taubes
Self - Investigative Science Journalist / Author
Nina Teicholz
Self - Investigative Science Journalist / Author
Ancel Keys
Self (Archival footage) - Physiologist
Tim Noakes
Self - Scientist / Author / Professor Emerita

Mark Hyman
Self - Narrator / Nutritionist / Functional Medicine Physician

Bret Scher
Self - Cardiologist
Sarah Hallberg
Self - Obesity Specialist
Zoe Harcombe
Self - Obesity Researcher
Salim Yusuf
Self - Cardiologist

Robert Lustig
Self - Pediatric Endocrinologist
Jason Fung
Self - Diabetes Specialist

Bill Maher
Self - Comedian (archive footage)

Eric Westman
Self - Obesity Specialist
Jonny Bowden
Self - Certified Nutritionist

Dwight D. Eisenhower
Self - President (archive footage)