Widely recognized in medical circles for its ability to increase blood circulation as well as removing blood stasis. It contains flavonoids that may prevent arteriosclerosis (hardening of blood vessels) and improve blood circulation. As a powerful antioxidant herb, it is best known for its ability to enhance circulation, to squeeze through the narrowest blood vessels and to increase the supply of oxygen to the heart, and brain. The active ingredients in Ginkgo biloba extract are the flavonglycosides and terpene lactones.