Isotonix OPC-3: What is it? A dietary supplement has a number of the most efficient bioflavonoids researchers have uncovered has been labeled as Isotonix OPC-3. Scientifically known as oligomeric proanthocyanidins, bioflavonoids are likewise called OPCs. ...

The following are what make up Isotonix OPC-3 Grape Seed Extract : 25 mg Found with high contents of oligomeric proanthocyanidins (OPCs) compounds, grape seed extract is usually extracted from the seeds of red grapes ...