gh is said to split/increase the number of cells instead of just increasing the size of the cell like steroids would, site injecting GH will not have any benefit to increasing site growth, most prefer to inject GH in the abdominal fat as its said to have fat burning properties in the areas in which its injected, insuln again does not increase site growth, it enters your system so quickly its in and out, insulin just allows your body to utilise nutrition more quickly and efficiently, igf however has been studied and is said to have the capability of inducing site growth by increasing sensitivity of satelite receptors therefore creating more opportunity for the injected muscle to grow, the trick with igf is to inject into lagging muscle groups and eat like a machine....

both gh and igf are the new "steroids" but come with a nice price tag too, so imo if you cant affordto do it correctly for long enougth then dont bother, you can gain very well on gear alone, but once you hit a rutt years down the road or if you compete or need to maintain gains between cycles then these druga are evry helpfull, the same can be said for insulin, you can reapthe benefits, but the benefits dont come without a price, whether it be money or health risks....