This product contains GinkgoSelect ; which is produced by a patented; multi-phase extraction process resulting in a standardized 24% ginkgoflavonglycoside (or heteroside) and a minimum of 6% terpene lactone extract. Ginkgo Biloba has a wide range of beneficial effects; including circulatory and antioxidant protection. The extraction of GinkgoSelect is protected under U.S. patent # 5;043;323.Keep in a cool; dry place out of the reach of children.