Many men are skeptical of testosterone supplementation and their ability to provide effective results. Some men wonder what testosterone supplements do. They are leery of spending their money on products that claim to work, yet fail to deliver. Fortunately, most natural testosterone supplements do, in fact, work. One thing that man men that opt for supplements over prescription testosterone especially appreciate is the fact that supplements work without the necessity to deal with potentially harmful side effects. It is important to choose the right supplement in order to achieve the desired benefits.