Gut microbiome in health and disease: linking the microbiome-gut-brain axis and environmental factors in the pathogenesis of systemic and neurodegenerative diseases. Pharmacol Ther. 2016 Feb; 158: 52–62. . doi: 10.1016/j.pharmthera.2015.11.012. Shivani Ghaisas, Joshua Maher, and Anumantha Kanthasamy https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4747781/
8 Ways To Increase BDNF Levels (Brain-Derived Neurotrophic Factor) http://mentalhealthdaily.com/2015/03/30/8-ways-to-increase-bdnf-levels-brain-derived-neurotrophic-factor/ Transplantation of fecal microbiota from patients with irritable bowel syndrome alters gut function and behavior in recipient mice. Science Translational Medicine, 2017; 9 (379): eaaf6397 DOI: 10.1126/scitranslmed.aaf6397