Pine Bark Extract (Pinus strobus, Pinus massoniana)
Pine bark extract is prized for its powerful free radical-scavenging polyphenolic flavonoid constituents, oligomeric proanthocyanidins (OPCs), which support overall health and wellness. Various Pinus species are used in the non-trademarked version of this herbal supplement.
Pine bark, like grape seed extract, delivers proanthocyanidin flavonoids. While optimal levels aren't known, 50-100 milligrams of proanthocyanidins are recommended.