Number of Human and Bacteria Cells in the Body

Are there more bacteria cells in our body than human cells?

24 mins
What is it about?


Health Sciences

PLOS (Journal)

The aim of this study is to critically revisit former estimates for the number of human and bacterial cells in the human body. By updating the cell counts in the body, we also revisit the 10:1 value that has been so thoroughly repeated as to achieve the status of an established common knowledge fact. This ratio was criticized recently in a letter to the journal Microbe, but an alternative detailed estimate that will give concrete values and estimate the uncertainty range is needed.