A new study this work looked at the interaction of all the types of bacteria in the gut as well as the metabolic activity of the bacteria.
The authors showed that "both gut species and microbial functions interact with almost all molecules measured in the gut, which is not surprising, as it’s where they live. More interesting was the fact that almost half of the molecules measured in blood also showed an association with the gut microbes, with microbial functions carried out by microbial teams showing eightfold more associations than individual species."
For the author's summary of the results, click here
For the original article, click here