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  • Current: Dec 24, 2023

Proanthocyanidin

Proanthocyanidins are oligomers or polymers of flavan-3-ol units. Proanthocyanidins are also called condensed tannins; however, this term is not recommended because "tannin" does not refer to a specific compound.

The major building blocks of proanthocyanidin include, but not limited to, (+)-catechin and (−)-epicatechin.



Definitions in the literature

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  • Proanthocyanidins, also known as condensed tannins, are oligomers or polymers of flavan-3-ol units [1].
  • Proanthocyanidins (PAs), also called condensed tannins, are polymeric flavan-3-ols that probably constitute the second most abundant class of polyphenols in the plant kingdom after lignin [2].