Grape Seed OPC is a highly concentrated natural extract with a minimum of 90% Polyphenols, including OPCs (Oligomeric Proanthocyanidins), the powerful free radical scavenging compounds found in Grape Seeds.* Grape Seed Extract and OPCs have been the subject of numerous scientific studies that demonstrate their ability to affect key molecules involved in the maintenance of healthy tissues and the support of cardiovascular health.* In addition, preliminary studies suggest that Grape Seed Extract may protect healthy brain and nerve tissues.*