Winston you can tell it is urine because you can only add nitrites to a urine sample and the level 50ng/ml is used in urine testing while hair tests use 1 picogram/mg of hair as the inital cutoff.
FakeBoobsRule Reviewed by FakeBoobsRule on . Anybody know this type of test anybody on who knows what kind of test is a 19254n sap 6-50/300+alc/nit Rating: 5