Do you know about your microbiome? This army of microbes fights for you, and sometimes when things get out of whack, it can fight against you. Learn all about your microbiome and what it can do for you in this fascinating new episode of SciShow, hosted by Hank Green! ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com/ Instagram: http://instagram.com/thescishow ---------- Sources: http://www.nature.com/news/scientists-bust-myth-that-our-bodies-have-more-bacteria-than-human-cells-1.19136 https://lhncbc.nlm.nih.gov/files/archive/pub2001047.pdf http://learn.genetics.utah.edu/content/microbiome/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3426293/ http://jb.asm.org/content/192/19/5002.full https://www.ncbi.nlm.nih.gov/pubmed/23201354 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4290017/ http://www.mayoclinic.org/diseases-conditions/c-difficile/home/ovc-20202264 http://www.health.harvard.edu/staying-healthy/clostridium-difficile-an-intestinal-infection-on-the-rise https://www.ncbi.nlm.nih.gov/pubmed/26104013 http://gut.bmj.com/content/early/2016/03/14/gutjnl-2015-311339.abstract https://www.scientificamerican.com/article/gut-fungus-suspected-in-crohn-s-disease/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4831151/ http://www.npr.org/sections/thesalt/2013/11/08/243929866/can-we-eat-our-way-to-a-healthier-microbiome-its-complicated http://www.nature.com/news/bacteria-found-in-healthy-placentas-1.15274 http://www.nytimes.com/2013/08/29/science/human-microbiome-may-be-seeded-before-birth.html Images: https://commons.wikimedia.org/wiki/File:EscherichiaColi_NIAID.jpg https://commons.wikimedia.org/wiki/File:Microbiome_Sites_(27058471125).jpg https://commons.wikimedia.org/wiki/File:MYA3404_Ctropicalis_WT.png https://commons.wikimedia.org/wiki/File:ClostridiumDifficile.jpg