D-Aspartic Acid by AISports Nutrition
DAA, is an all natural testosterone booster. DAA works by increasing the levels of Luteinizing hormone in the body, which has a corresponding effect of increasing testosterone levels. DAA 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.