HAHAHA. Its not just the lab that makes the diff, you the person injecting needs to be in a sanitary environment. They need to use clean needles, clean the area etc... A lot of factors play into these.
There are lots of pros that use pharma shit and still get infections. Look at Jay at the 2007 Olympia, his shoulder had a site infection. I doubt he's buying his shit from that UGL in romania.
