True. But wouldn't you agree that 4 iu would raise IGF-1 far above normal levels? I think that's where the risk comes in.Just wanted to add here that every person's body in this thread is pulsing out GH on regular basis whether they like it or not. So if you've got cancer cells, they are getting stimulated by your natural IGF-1 regardless.
That's true but there's more to the story. If it were really that dangerous, then every NPC and IFBB bodybuilder would either be ate up with cancer or dead, but that's not the case. The fact of the matter is that the body excretes all sorts of cancer fighting chemicals as a reaction to intense exercise, so the problem is not as simplistic as pointing a finger at GH alone.