The Testogen formula is composed of ingredients that help increase free testosterone levels in the body. One of these Testogen ingredients is boron, a trace element that has been shown to help improve metabolic health.

Good metabolic health ultimately leads to the burning of excess body fat. This reduced body fat means that more of the body's total testosterone is converted into free testosterone.

Furthermore, another ingredient, nettle leaf extract, prevents the growth of a protein called SHBG, which binds to testosterone. Therefore, it stimulates free testosterone levels in the body.