According to the manufacturer, the science behind the working of Extenze review product is pretty much simple. We are told it help boost circulation of blood in the body. All the parts of the body, especially your penile chamber will receive adequate supply of blood, thus allowing you to achieve and maintain an erection with so much ease. Extenze review product accessibility is quite limited. It is not sold in any physical store or pharmacy near you. You can, however, make your order through the company main website.