Ginseng has been known since ancient times to act as a libido and erection enhancer. What ginseng does best is keep your arteries and veins relaxed, which can help improve blood flow. It has the opposite effect on the body than having a high blood pressure. What more can a person want? Well, you might be thinking that ginseng also boosts testosterone since it's on this list - and you'd be right. The steroidal saponins present in ginseng have been shown to increase both testosterone and DHT production.