Testosterone Enanthat 250steroid injectionssteroidTestosterone Enanthate 250 (Testosterone Enanthate) is one the most used anabolic hormone. Testosterone Enanthate is a long acting form of the parent hormone testosterone. In this particular case, the parent hormone has been attached to the Enanthate ester to delay its release into the bloodstream over several days. Testosterone serum concentrations remain elevated for 5 - 8 days after IM administration. Test-E has both anabolic and androgenic effects.