The film traces the origins of our beliefs about healthful and unhealthful food. Experts from all over the world talk about the problems as well as short and long term solutions. Among the many experts in the film are authors like Gary Taubes, Mark Sisson, and Melanie Warner. Medical doctors such as David Perlmutter M.D., David L. Katz, and Timothy Noakes share insights that ar... (展开全部)