PCOs are potent antioxidants that occur in plants.
Grape seeds and pine bark are especially high in these substances. Each one is 50x stronger as an antioxidant than vitamins C and E.
Americans ingest only 25 mg/d of plant-based antioxidants.
Using 150 mg of PCOs can help protect from degenerative diseases.
In particular these antioxidants are highly protective to the heart, for healthy cells during chemotherapy, against blindness in diabetes, and more.
Both pine bark and grape seed extracts are widely available.