Ginkgo biloba is made from the Ginkgo biloba tree. It improves circulation throughout the body and therefore, it may help men with erectile dysfunction. A study in the Journal of Urology showed that ginkgo to be more effective than drug injections for impotence.

Research also suggests that ginkgo biloba helps enhance brain function, vision and circulation to the extremities as the improved circulation increases the oxygen and nutrients available to these areas.