Pycnogenol 100mg 60ct by Pure EncapsulationsWhat Is It? Pycnogenol is a pine bark extract rich in proanthocyanidins and antioxidant properties. While Pycnogenol originally denoted all proanthocyanidin extracts, regardless of source, it now refers specifically to maritime pine bark extract.* Uses For Pycnogenol Vascular Support: The mixture of proanthocyanidins in pine bark supports vascular endothelial integrity by stabilizing collagenous membranes. They also promote vascular function by