There was a thread on this topic a while back. IMO I would'nt use it. I have tossed out shit that IMO sat around too long. Remember, you are injecting foreign substance into your body anyway, we all know this stuff has sides. Why risk further stress on your internals by useing potentially bad gear? I think 6+ years is a bit too far out of date. If anything it probably has lost most of it's effectiveness by now. So you would be putting yourself at extra risk for maybe no gains. There will be others that will disagree with me and that's fine. I'm called oldfella for a reason. Cause I like to think I'm careful at what I do and I don't take too many chances with this stuff. It's called respect for your body and respect for the drugs we choose to use.