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
as Self - Investigative Science Journalist / Author

Nina Teicholz
as Self - Investigative Science Journalist / Author

Ancel Keys
as Self (Archival footage) - Physiologist

Tim Noakes
as Self - Scientist / Author / Professor Emerita

Mark Hyman
as Self - Narrator / Nutritionist / Functional Medicine Physician

Bret Scher
as Self - Cardiologist

Sarah Hallberg
as Self - Obesity Specialist

Zoe Harcombe
as Self - Obesity Researcher

Salim Yusuf
as Self - Cardiologist

Robert Lustig
as Self - Pediatric Endocrinologist