This product contains GinkgoSelect which is produced by a patented, multi-phase extraction process resulting in a standardized extract of 24% ginkgoflavonglycosides (or heterosides) and a minimum of 6% terpene lactone. Jarrow Formulas Ginkgo Biloba is synergistically combined with Grape Seed OPC LeucoSelect 100:1 consisting of flavan monomers, gallic acid and dimers and OPCs ranging from 2 to 7 condensed flavan units providing best antioxidant activity.