The ‘Two-Pin’ technique increases sanitation for multiple dose vial users. They draw with the first pin, and then shoot/inject into the body with a new one. This procedure prevents any residual contaminants that may have remained on the drawing pin from being transferred into the body via the injection site. It also makes injection less painful since the drawing needle is necessarily dulled during passage through the rubber stopper atop the vial. A dulled needle increases injection pain because it doesn’t pierce the body as cleanly as an unused one. The protocol below is followed by AAS users who draw from multiple dose vials, but steps 4 - 8 are routinely disregarded by those users who draw from ampoules (also called ampules) and sachets.
Aside from bulking and cutting stacks, there are plenty of athletes out there who use Turinabol specifically to boost the performance of other steroids. Its ability to bind with SHBG, or sex hormone binding globulin, means that any other steroid you pair with Turinabol will be able to flow freely throughout your body, especially to the muscles where they can help build lean tissue. When paired up with a popular cutting steroid such as Primobolan Depot, it allows that steroid to do a better job of retaining lean muscle mass during times of caloric deficit. In these cases, the Tbol results speak for themselves.