Ginkgo is derived from the world's oldest living tree species. It has been used medicinally in China for over 5,000 years. Extensive studies have revealed that Gingko particularly improves the blood flow to your brain & extremities. It does so by relaxing & therefore dilating the muscle walls of small blood vessels, decreasing inflammation & platelet clumping, & improving the fluidity of blood. Gingko also improves symptoms of cerebral vascular insufficiency by relieving dizziness, headaches, weakness, behavioral abnormalities, depression, anxiety, memory, concentration & attention span problems.