See also: Ed Yong in The Atlantic, who has a nice story on this that includes some rather fun sentences [1]: <a href="http:&#x2F;&#x2F;www.theatlantic.com&#x2F;science&#x2F;archive&#x2F;2016&#x2F;01&#x2F;youre-probably-not-mostly-microbes&#x2F;423228&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.theatlantic.com&#x2F;science&#x2F;archive&#x2F;2016&#x2F;01&#x2F;youre-pro...</a><p>[1] Such as: &quot;In 2014, Judah Rosner from the National Institutes of Health drew attention to this “fake fact” in a letter to Microbe magazine. More recent estimates, he noted, put the total number of human cells at anywhere from 15 trillion to 724 trillion, and the number of gut microbes at anywhere between 30 trillion and 400 trillion. Which gives a ratio that can best be expressed as ¯\_(ツ)_&#x2F;¯.&quot;