Sostonol 250 employs enzyme blocking herbs (DHB, Buplerum, Hoelen), whose function is to bind with, and remove destructive CYP and P-450 liver enzymes from the body. The reason for this is that these same enzymes are responsible for destroying anabolic compounds before entering the bloodstream. Removing these enzymes clears the way for the active anabolic ingredient to travel into the bloodstream with little or no interference, increasing the effectiveness of anabolic agents like Sostonol 250TM by as much as 40%!