Consumers have a difficult time finding analytical labs testing for harm reduction.Do you see how hard it is for us to find somewhere to mass spec samples? Do you think sources have some magical lab to mass spec their raws that we are unaware of? The fact is that there are multiple factors that go in to brewing on a large scale that make a properly dosed vial a virtual impossibility.
You are right - it must be much more difficult for a UGL to find a lab that wants to be an accomplice for an illegal drug distribution enterprise by providing quality control. You would think those who choose such a criminal career path would know how to get it done. But they don't.