Most Powerful Anabolic-Androgenic Steroid.Halotestin, is one of the most powerful anabolic-androgenic steroids out there. In the world of performance enhancement, Halotestin holds a reputation of being one of the most powerful and fast acting steroids on the market.Like the others, it is a derivative of the steroid testosterone. Its primary function is not as a performance enhancing drug but as a testosterone replacement for those experience growth problems.As a gonadal steroid it induces puberty among male teenagers. It also works as an anti-estrogen for women who have breast cancer. The good news in using Halotestin is its does not aromatase to estrogen. This minimizes the tendency of virilisation and androgenic side-effects. Fluoxymestorone is the parent steroid of Halotestin. While it is derived from testosterone it has weaker or milder effects to the body.