MethylTrienolone also known as Metribolone is a synthetically active anabolic-androgenic steroid and 17 a-alkylated nandrolone (19-nortestosterone) derivative. More effectivelly MethylTrienolone is the 17 a-methylated derivative of trenbolone. Due to its liver toxity its not widely used but we have been able to create an injectable form which will have a lesser negative affect on the liver. Please note it is still a very powerful MS and to be used only by ADVANCED ATHLETES ONLY !