Actually, it only shows the presence or a compound, not purity. So if it contains 10mg of test and 90mg of flour. You wont know.
$5 labmax test vial if you buy the refill or case is still a good deal if you compare to $200 lab testing if you lucky to find one.
It does exactly what they explain it does, so it is a good tool to have.
But go ahead test on your live, your choice, I would not inject any shit unless I pre-screen with labmax first