Block estrogen from hindering your performance with Hi-Tech Pharmaceuticals Arimistane. Arimistane binds to aromatase enzyme to prevent estrogen rebound. Not only does it help prevent estrogen rebound, but it also works to reduce the circulating levels of estrogen as well. It has also been shown to reduce cortisol rates and increase testosterone levels. It's role as a suicide inhibitor decreases the number of androgens that convert to estrogen. Arimistanewill elevate the user’s natural myotropic state, leading to more muscle mass, better recovery, decreased fat storage, and increased libido! The first effects users notice is a drying out and hardening effect, showing increases in vascularity and increased definition.