Standarized Extract. 100mg Extract per Capsule. 95% Polyphenols Including Oligomeric Proanthocyanadins. A natural antioxidant and a rich source of Bioflavonoids grape seed -power 100 is high quality effective form of Grape Seed Extract. Standardized for 95% (95mg) Polyphenols including Oligomeric Proanthocyanidins per capsule Grape Seed-Power 100 offers naturally balanced active principles while retaining and enhancing plant synergistic benefits thus making it one of the world's finest and purest plant extracts.