... Pine Bark Extract, French Maritime Pine Bark Extract, Leucoanthocyanidins, OPC, Oligomeric Proanthocyanidins, PCO, Pine Bark, Pinus maritima, Pinus pinaster , Procyandiol Oligomers, Procyanodolic ... ADHDWhat makes pine bark extract so special?It’s the oligomeric proanthocyanidins, which are a class of flavonoids that a French researcher ...