POPULAR ARTICLE: “Evidence mounts that gut bacteria can influence mood, prevent depression” https://www.sciencemag.org/news/2019/02/evidence-mounts-gut-bacteria-can-influence-mood-prevent-depression SUPPORTING ARTICLE: “Gut microbiota’s effect on mental health: The gut-brain axis” https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5641835/