Non-GMO 100% Vegan Dietary Supplement Ginkgo Biloba 24% Ginkgo Flavonoids 6% Terpene Lactones Guaranteed Potency Lab VerifiedDiscussion: Native to China, ginkgo biloba is one of the oldest living tree species in the world. The leaves, flowers and nuts of the ginkgo tree have a history of use throughout the world dating back over 5,000 years. Ginkgo leaves contain many compounds including antioxidant flavonoids and terpene lactones.