IGF-1 duration/PWO

When i previously studied igf-1,i understand it can be run everyday for 5 weeks max, because of receptor downgrade i guess. But i also learned that if you run it just PWO, then you can do this indefinately. Can anyone confirm or deny this? If thid is true, then this would be a godsend for me.

I've been running it pre workout for longer than I can remember. Definately no downgrade in it's actions although as my show is nearing I am upping the dosage dramatically with fantastic results.

Thanks for the reply! I was going to run it PWO only/subq. Looking for a systemic effect, not just one bodypart i trained. Anyone tried it this way?