HRD Surge Male Enhancement This weed can be found in several enhancers and is said to boost your libido as well as increase the flow of blood that goes through the male organ in order for men to achieve an even harder and longer erection. So if the problem that you have has something to do with your inability to get an erection, then look for a supplement that contains horny goat weed. The ginkgo biloba is commonly found on male enhancers and it works by improving the blood flow on the male organ so he will be able to achieve an erection easily. Aside from helping the male organ to erect, this herbal ingredient also helps to achieve proper blood and oxygen circulation in a man's body.