The theory is that it will although I have never gotten "remarkable" results from this. It does help if it is a fast acting compound like test suspension, prop, or winny.
I heared that if you site inject Winny, Prop ect... it may help growth in that area. I plan to inject Omna and Fina in my Bi's and Tri's in hopes of geting some growth.
Did winny delt shots with great results but I'm a little scared of the prop injects just because it hurts alot in the quad so my arm would fuckin kill!