Withania Somnifera – This is one of the most effective herbs that promote penis enlargement. As you can find out in this research, Withania Somnifera can increase muscle mass and strength. Besides that, it provides enough nitric oxide, which is important for obvious reasons. Through this work, we have been made aware of a number of illegal potency-enhancing products which all contain active substances appearing neither from the product declaration nor the package. The products, which are often sold on the internet, can be dangerous to health, and we therefore warn consumers against using them.