Grapeseed Extract helps maintain antioxidant health. It contains oligomeric proanthocyanidins (OPCs), which are naturally occurring bioflavonoids.. Grapeseed Extract contains typically 95% phenolic compounds such as oligomeric proanthocyanidins, monomeric polyphenols (catechins, epicatechin & epigallocatechin), organic acids (citric, gallic, epigallic acid & malic acid). Ingredients Grape Seed Powdered Extract (providing 90 mg [90%] polyphenols) Suggested Use one (1) to two (2) vegetable capsules daily, preferably at mealtime, or as directed by a healthcare practitioner.