Testo-HD ® is an all-natural testosterone booster. Testo-HD ® works by increasing the levels of Luteinizing hormone in the body, which has a corresponding effect of increasing testosterone levels. Testo-HD ® can also boost dopamine, and GABA levels, as well as possessing the ability to enhance nitric oxide production.

All in all, you are getting a very fast and potent increase in testosterone levels, as well as accompanying increases in dopamine and GABA, all while increasing nitric oxide levels. Add these abilities together, and you get a very potent combination capable of causing drastic increase in lean body mass.