Long R3 IGF-1 -- Media or Receptor Grade???

[Ethan James]

I am trying to educate myself on IGF-1. Many of you guys on here are already educated and maybe seasoned users of it. I found a supplier of it for research purposes but there are two types of Human Long R3; Receptor grade and Media grade. There is a HUGE price differential (receptor being almost 10X that of media); can anyone explain the difference between the two?

Thanks!
-EJ

 

[Ethan James]

nevermind...

Shame shame... I posted my question before doing a search on media AND receptor AND grade...

For those of you who want to know the answer:

http://www.professionalmuscle.com/forums/showthread.php?s=&threadid=4461&highlight=media+grade

EJ