HUGH...im sticking them directly in my peak and right around that area watching out for my veins that are sticking out. Size is starting to get dramatic, for some reason my lower bi's on each arm are responding better to my uppers. Im not gonna over do it with this stuff, maybe a cycle or two of it, i dont want my bi's to look ridiculious, my bi's are my only lagging bodypart, thats the only place i'll use synthol