SUMMARY: This is not a 1950s sci-fi movie. This is what is likely happening now in your gut according to an amazing study just now publishing in Cell. If you are eating the Standard American Diet, the normal, helpful bacteria in your gut are not getting natural whole food fiber. Instead they are being fed fiber additives supplemented in processed foods, or isolated fiber supplements you are buying. Surprisingly, both the fiber additives and the supplements FAIL to feed your microbiome, and instead, they CANNIBALIZE the mucus lining for fuel, at least for mice, according to this study. Repeat: Fiber Additives Starve Gut Microbes. They Eat Mucus Lining. That compromises the intestinal barrier role in preventing pathogen infection. Bottom line: EAT WHOLE FOOD BASED FIBER to feed your microbiome AND DON’T COUNT ON THE FIBER ADDED IN PROCESSED FOODS OR THE SUPPLEMENTS YOU TAKE FOR THAT FIBER. No wonder so many are sick.