Test Stack No.17 is unlike anything else on the market. It’s a unique combination of ingredients that are designed to increase the natural production of testosterone within your body. It doesn’t replace your testosterone, instead, it allows your own hormonal system to create more of its own. And along with that improved increase in testosterone comes all the benefits - greater strength, more muscle, less fat, increased libido and improved erectile function. In other words, it makes a man more like a man.