IGF-1 will not give you immediate strength gains like test would, it creates hyperplasia as opposed to hypertrophy. Hypertrophy is making your existing muscle cells bigger. Hyperplasia is the formation of new muscle cells and essentially changes your genetic capabilties. You can the take a cycle of test and mature these new muscle cells and find a whole new world of growth that you won't find from steroids alone. Hope this helps. Read the stickies in the growth factor forum.