More than 70 percent of American believes documentaries are trustworthy on food information, according to a recent survey by the Chicago Council on Global Affairs. The survey data should be welcome news for filmmakers such as Robert Kenner, who made “Food Inc.,” but disturbing for the many groups on all sides of food issues, according to the Hagstrom Report. Documentaries did fall in the middle of the pack, though, as the survey found Health professionals rank the highest at85 percent, followed by friends and family at 83 percent, farmers at 82 percent. The survey found only 50 percent of Americans find print, broadcast and online media trustworthy and only 38 percent find blogs and social media credible. The survey however, did not highlight that data, noting consumers care most about affordability and food safety when deciding what food to buy.