GH won't shut down your test production granted its fairly useless without aas it will however shut down your bodies natty GH production although this is not a big deal as you can pct with ghrp's or if u pin eod you could pin a ghrp on ur days off GH same goes for if u pin 5 on 2 off. But my opinion is that if your running GH you might as well run some regular aas as well otherwise your just throwing money away