Bacterial metabolites / Microbial metabolites

What does Bacterial metabolites / Microbial metabolites mean?

Human microbiota, especially gut bacteria , produce unique enzymes that create diverse small molecules as intermediate or end products facilitating chemical communication between host and microbes (2, 3, 4, 5, 6, 7). The bacteria in the Gut microbiota have numerous genes involved in the biosynthesis of secondary metabolites (15).

What percentage of serum metabolites come from commensal microbes?

Up to 50% of serum metabolites come from commensal microbes (38).

Which three categories of microbi…