Pycnogenol is a unique combination of proanthocyanidins obtained from the bark of the French maritime pine. As a potent natural scavenger of free radicals, Pycnogenol helps to protect the body's tissues from oxidative stress and supports a healthy, balanced immune system response to normal metabolic stress. Through these mechanisms, Pycnogenol helps to maintain healthy eye, skin, and joint tissues. In addition, scientific studies have shown that Pycnogenol helps to maintain vascular strength and function. Pycnogenol is a registered trademark of Horphag Research Ltd. Use of this product is protected by U.S. patent #6,372,266 and other international patents.