Proanthocyanidins in grape seeds: An updated review of their health benefits and potential uses in the food industry

Grape seeds are rich sources of proanthocyanidins, which comprise polyhydroxyflavan oligomers or polymers. The beneficial health properties of grape seed proanthocyanidins are attributed to their conjugated and colonic metabolites. There is potential for a two-way relationship between the gut microbiota and grape seed proanthocyanidin. In particular, numerous in vitro and in vivo studies have demonstrated that grape seed proanthocyanidins appear...