Isotonix OPC-3 is an isotonic-capable food supplement that is made from a combination of bilberry fruit extract grape seed extract, red wine extract, pine bark extract and citrus bioflavonoid extract. The pine bark, grape seed and red wine extracts are good natural sources of oligomeric proanthocyanidins (OPCs).The OPCs in Isotonix OPC-3 have been shown to help to maintain general well-being. OPCs are bioflavonoids (complex plant compounds) found in fruits, vegetables and certain tree barks that provide health benefits. Isotonix OPC-3 contains the only isotonic form of Pycnogenol® in the world. Pycnogenol is a natural plant extract from the bark of the French maritime pine tree and a widely researched bioflavonoid. Isotonix dietary supplements are delivered in an isotonic solution. With Isotonix products little nutritive value is lost, making the absorption of nutrients efficient.Pycnogenol is registered trademark of Horphag Research, Ltd. Use of this product may be protected by one or more U.S patents and other international patents.