What is VigRX Plus? It has been formulated with a series of 10 potent natural erection precursors, aphrodisiacs, and libido enhancers that quickly build up in your system to measurably improve your sexual performance. The main ingredients of this product for men is directl target nitric oxide levels, which helps to relax the smooth muscle tissue of the corpus cavernosa, the two long cylindrical tubes in the penis, and its associated arterioles to increase blood flow to the penis. This results is amazing because it is noticeably thicker, fuller erections.