In addition to increasing the nutrient efficiency, trenbolone can as no other drug stimulate the following most typical activities of anabolic steroids: acceleration of protein synthesis and maintenance of positive nitrogen balance. Protein synthesis determines how rapidly the body will build muscles, at that, the higher the nitrogen balance is, the more proteins will be built. Our muscle tissue consist of about 16% nitrogen, and, despite the fact that this value seems to be low, if the percentage falls below the optimum line, catabolic processes will win the battle in the body.
Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.
Trenbolone enanthate , known by the nickname Trenabol , is a synthetic and injected anabolic–androgenic steroid (AAS) and a derivative of nandrolone which was never marketed.   It is the C17β enanthate ester and a long-acting prodrug of trenbolone .  Trenbolone enanthate was never approved for medical or veterinary use but is used in scientific research   and has been sold on the internet black market as a designer steroid for bodybuilders and athletes .