Only if you are running the GH for extended periods of time. In other words if you are doing a six month GH cycle and you run IGF-1 for 4 weeks along with it it would be usefull. But dont run the GH only as long as the IGF-1 or it would be a waste IMO. Proud13 knows more about this, he might chime in.
I've done 3 cycles of IGF and hGH and then go off everything in between.
I'd read that IGF and hGH were synergistic but I don't know if that is accurate or not.
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