Desc: World's Best Diet: Directed by Lana Salah. With Jimmy Doherty, Kate Quilton, Magnús Scheving. The World's Best Diet explores some of the world's most varied diets. Jimmy Doherty and Kate Quilton travel around the globe looking at the dietary habits of countries, tribes and communities to trace the story of how eating habits across the planet have changed radically over the last 50 years, and how this has affected our health.