Parabolan is the brand name and trade name for the anabolic steroid Trenbolone Hexahydrobenzylcarbonate, commonly and informally abbreviated as Tren Hex or Trenbolone Hex.
Tren Hex is without a doubt, the most powerful injectable anabolic steroid. Tren Hex is similar to the highly popular steroid Nandrolone, in that they are both 19-nor steroids, meaning that a testosterone molecule has been altered at the 19th position to give us a new compound. Unlike Nandrolone however Tren Hex is an excellent mass and hardening drug with the majority of gains being muscle fiber, with minimal water retention.