Ginkgo biloba. This herb has the ability to stimulate blood circulation. Studies held to determine the usefulness of this her show that it is indeed helpful in enhancing sexual functions of many individuals. Stamina is also improved by ginkgo biloba as it can enhance a man's energy levels; Testoultra thus making it an ideal ingredient in natural male enhancement products. Ginseng. This typical Chinese medicine herb is used in treating various kinds of disorder, including sexual impotence. It can increase your sexual performance and improve your sexual health.