White pine bark comes from the inner bark of a white pine tree. The inner bark of pine trees has been used in medicine for centuries and is still used in cough remedies. White pine bark is known for its antioxidant properties. White pine bark contains proanthocyanidin, a bioflavonoid that is taken for arthritis, bruises, gum disease, ulcers, and vascular problems. White pine bark is believed to be beneficial in treating allergies, strengthening connective tissue, and increasing the elasticity of the skin. As a circulatory stimulant, it is believed that white pine bark will help in preventing the onset of cold and flu viruses.

This particular bark has historically been used as a rich source of Vitamin C-like compounds and the Proanthocyanidian Bioflavonoids. These powerful antioxidant ingredients have been found to be useful for immune system enhancement, as well as providing strength and integrity to connective tissue, capillaries and veins, thus useful in strengthening the fragility of capillaries and preventing, if not diminishing varicose veins. The proprietary proanthocyanidian antioxidant complex, Pycnogenolr, is notably derived from white pine bark alone, and therefore does not contain all the active bioflavonoids present in white pine bark.