Aseem Malhotra

as Self - Consultant Cardiologist

Donal O'Neill

as Self - Producer, Cereal Killers

Stefano Pisani

as Self - Mayor of Pollica Italy

Antonio Morinelli

as Self - Proprietor, Suscettibile Restaurant, Pioppi

Susan Bessie Haslam

as Self - English Teacher, Acciaroli

Ancel Keys

as Self (archive footage)

Stephen Phinney

as Self - Author, The Art & Science of Low Carb Performance

Ida Budetta

as Self - Proprietor, San Giovanni Winery