Pine Bark (Pinus Maritima) is a medicinal plant used primarily for its proanthocyanidin content. Proanthocyanidin is a bioflavonoid which has demonstrated anti-oxidant properties and is taken by some as a treatment for arthritis, bruises, gum disease, ulcers, varicose veins, and other vascular problems. It has also been utilized in the treatment of allergies that respond to antihistamines. It is thought to protect and strengthen connective tissue.

Pine Bark can be taken as tablets, capsules, tinctures, or as a tea.

Proanthocyanidins are also considered helpful in improving and preserving the elasticity of skin by stabilizing collagen and elastin. Pine Bark's anti-oxidant properties may be helpful in treating hypoxia from artereosclorosis, inflammation, and cardiac or cerebral infarction.

Pycnogencol (procyanidin extracted from Pinus maritima) is a trademarked, highly standardized extract of Pine Bark.