Table 2.

Main metabolites derived from nonflavonoids and identified bacteria involved in their transformation.

Precursors	Main identified metabolites	Bacteria	References
Ellagitannins	Urolithins	Butyrivibrio spp.	[38]
Lignans	Enterodiol Enterolactone	Bacteroides distasonis, Bacteroides fragilis, Bacteroides ovatus,  Clostridium cocleatum,  Butyribacterium methylotrophicum, Eubacterium callanderi, Eubacterium limosum, Peptostreptococcus productus,  Clostridium scindens,  Eggerthella lenta	[39–42]
Hydroxycinnamates	3-Hydroxyphenylpropionic acid Benzoic acid 3-(4-Hydroxyphenyl)propionic acid Vanillin	Escherichia coli, Bifidobacterium lactis, Lactobacillus gasseri	[43–45]