What took blue food so long to catch on? Today it\u2019s all over the freezer aisle, in candies for kids, in tortilla chips, and novelty foods, but it wasn\u2019t very long ago that food experts agreed: blue food was an impossible sell. Their best evidence was a study from the 1970\u2019s in which subjects were served blue steaks to sickening effect. On this episode, we uncover the strange, misinformation-stuffed history of blue food, the rise of blue raspberry, and what to make of the blue food experiment that made those people sick. It may have something to do with Alfred Hitchcock. This episode was produced in collaboration with Proof, from America's Test Kitchen. Proof is a podcast that investigates the food we love. Subscribe to Proof on Apple Podcasts, Stitcher, or Spotify.\nSpecial programming note: Decoder Ring is going seasonal! That means you won\u2019t hear from us for a while, but we\u2019ll be back in 2021 with a bunch of new stories released week-by-week. Thanks for sticking with us, we\u2019re excited to try something new, and we\u2019ll see you soon.\xa0\nLearn more about your ad choices. Visit megaphone.fm/adchoices