Ginkgo biloba L. is a tree species originating in China and Japan. Due to the leaf shape, ginkgo leaves are considered a symbol for the brain in Asian and occidental naturopathy. Extracts of the ginkgo leaves have properties that protect brain cells, improve blood circulation in the area of the small vessels and increase oxygen supply to the cells. As a result, ginkgo extracts have a beneficial effect on declining mental performance involving memory and concentration disorders. The root of Panax ginseng has similar properties. It increases energy and improves mental performance. The two plants complement each other in their effect.