Ginkgo biloba Extract is the finest quality available worldwide. Ginkgo is generally accepted as a remedy for minor deficits in brain function, such as those that occur with advancing age. It is used to improve concentration and combat short-term memory loss due to clogged arteries in the brain. Although the Ginkgo tree has been around for 200 million years, it's only during the last couple of decades that its true value has been recognized. Active compounds in Ginkgo extract improve circulation, discourage clot formation, reinforce the walls of the capillaries, and protect nerve cells from harm when deprived of oxygen. These ingredients also appear to have an antioxidant effect, sparing brain tissue from the damage caused by free radicals. Because the active ingredients are limited to minute quantities in natural Ginkgo leaves, only concentrated Ginkgo extract is really effective. NOW�uses a 50:1 botanical extract standardized to contain 24% Ginkgo flavonglycosides and 6%Terpene Lactones. This is the same form of extract demonstrated to have positive effects in clinical trials.