What anti-e preffered with GH?

[Bigshred]

I have been seeing posts floating around saying that Letro has the ability to decreases IGF levels. On the same note, I have been seeing posts claiming that Letro increases IGF levels. Now, I think it is common knowledge that Nolva will decrease IGF levels, but what is the verdict on Letro? If it does decrease IGF (exact opposite of what we are looking for with GH) then what anti-e is prefferred with GH?

[vitor]

An anti-estrogen could only affect your natrual output of GH, taking nolva or letro will make little, to no diffrence, on a GH-cycle.

That being said, letro has increased my natrual IGF levels off cycle according to BW.