Linked from
The 15 pages that link to Polyphenol, each with the reason it gives.
TanninNarrower topic: Tannins are a protein-binding subset of this broad chemical family.
CatechinNarrower topic: Catechin is one member of this chemically diverse group.
Ellagic acidNarrower topic: Ellagic acid is one member of this chemically diverse family.
QuercetinNarrower topic: Quercetin's multiple hydroxylated rings make it a plant polyphenol.
AnthoxanthinNarrower topic: Anthoxanthins belong to the wider family of plant polyphenols.