Scientific research has demonstrated that Ginkgo Biloba Extract has antioxidant activity in in vitro studies. NOW Ginkgo Biloba Extract is the finest quality available worldwide. NOW Ginkgo Biloba is grown and extracted under the highest quality standards and is standardized to minimum 24% ginkgoflavonglycosides and minimum 6% terpene lactones, including ginkgolide B, the most significant fraction, and ginkgolides A, C and bilobalide.