90% OPC Pine Bark ExtractNOW Pine Bark Extract is derived from the inner bark of Chinese Red Pine (Pinus massoniana), which is prized for its powerful free radical-scavenging polyphenolic flavonoid constituents, oligomeric proanthocyanidins (OPCs). Scientific studies indicate that Chinese Red Pine Bark Extract may help to support healthy cellular growth and reproduction. Green Tea Extract with EGCg has been included in this product for its abundant flavonols that complement the oxidant neutralizing of Pine Bark Extract.