Actually Vitalpeak XT has the functioning on the inner parts of your penis. Your penis contains two cylinders that are called corpora cavernosa and these are the most important cylinders because they cause erection. When you are aroused, the blood is pumped inside these cylinders and as a result, these cylinders are expanded and then you get harder erections. So it is clear that the hardness as well as thickness of erection depends on the capacity of these cylinders to expand as a result of pumping of blood. The natural ingredients of Vitalpeak XT work to improve the pumping of blood into these cylinders and so it improves your erections. http://www.supplementoffers.org/vitalpeak-xt/