like i have said before, the whole first pass thing is misleading, the way i have always understood it is that 17aa orals make numerous runs throught the liver before they are broken down, which is what they are meant to do. I would think the injectable, would be more of a time release, thus the liver would be working much more steadly, instead of being hit with 25 or 50mg all at once. But the liver is still doing the work, until someone can explain this to me better, that is the understanding i have of how Winstrol (winny) is brokend down.