No, bacteria do not outnumber your cells ten to one
I asked a question I had heard the answer to a hundred times: is it true that half the cells in my body are foreign bacteria? The answer turns out to be yes, roughly. Which is strange, because the version everyone repeats is that bacteria outnumber your own cells ten to one, and that version is wrong. The numbers In 2016, Ron Sender, Shai Fuchs and Ron Milo went and did the arithmetic properly. For a reference adult male of 70 kg: ...