biggest problem as zyglamail said is the legal issue of it. I can't think of any legit lab here in the US that would accept something illlegal without proper paperwork as they all have to fill out info to the DEA/FDA as to why they are in possession of, and testing a controlled and/or scheduled substance.
too many people have vested interest in things, and when you think of it all a lab report is, is a piece of paper that was printed and anybody could copy or alter with ease
So best thing anybody can really do, is try things and see if they work, take advice of mods or trusted vets who have knowledge into it or have seen or gotten tests done, or get things privately tested if you are lucky enough to have the connections to do so.......until things change legally here in the US then the possibility of getting legit lab tests done (that can be verified) probably will never happen