1. "Evolution of Diet - The Hadza of Tanzania", https://www.nationalgeographic.org/video/the-hadza-of-tanzania/
2. "CDC: 4 out of 5 Americans prescribed antibiotics each year", 2013 Apr, https://www.cbsnews.com/news/cdc-4-out-of-5-americans-prescribed-antibiotics-each-year/
3. "Antibiotics Screwed Up My Gut. Now What?", Anna Medaris Miller, 2017 June, https://health.usnews.com/wellness/articles/2017-06-26/antibiotics-screwed-up-my-gut-now-what
4. "Probiotics: How Effective Are They in the Fight against Obesity?", 2019 Feb, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6412733/
5. "Effects of Withania somnifera....", 2010 Jul, https://www.ncbi.nlm.nih.gov/pubmed/21170205
6. "The Hungry Gene: The Inside Story of the Obesity Industry" https://books.google.com/books?id=i_h8pgdN4cgC&redir_esc=y