Ginko biloba helps to maintain normal blood circulation by regulating the tone of blood vessels & inhibiting inappropriate blood clotting. In addition the powerful antioxidant action associated with Ginkgo biloba is particularly effective in protecting the brain tissue against the damaging effect of free radicals. Ginkgo biloba also known as the maidenhair tree is one of the world rsquo s oldest living tree species. Once widely distributed this species was almost destroyed during the last I