eLife assessment
This paper reports useful findings regarding gut bacteria that metabolize dietary flavonoids, which can enhance, reduce, or otherwise alter the flavonoid bioactivities. With a newly developed bioinformatics tool, the authors predict bacterial species that can metabolize parts of the flavonoid tilianin. Formal proof of concept is missing, but if experimentally confirmed, the study will change the way we think about metabolism of flavonoids and would be of broad interest regarding gut bacterial metabolism. Most of the analyses are compelling, but others require further inquiry.