A natural compound that is a metabolite of DHEA, Arimistane™ is known as an "aromatase inhibitor." Aromatase is the enzyme that converts testosterone into estrogen, as an inhibitor of aromatase, Arimistane™ binds to the aromatase enzyme preventing it from converting your testosterone into estrogen. This prevents the production of excess estrogen and also results in higher testosterone levels, as by preventing the conversion to estrogen, your body's testosterone levels remain higher. Additionally, it helps to reduce cortisol, which is a hormone that actually causes muscle catabolism and increases in fat. As a standalone ingredient Arimistane helps to increase muscle hardness and reduce body fat and water retention.