Question I have a friend of mine that is a manager of a restaurant and he told me he had one of his employees take a test and fail. They told him he used synthetic urine. So my question is does synthetic urine show up as masking, or adding, or show up as synthetic urine? If you use quick fix will the lab know you used synthetic urine? Is it better to use clean powdered urine(real) or synthetic urine? Anyone heard of someone failing a test because of synthetic urine? I have synthetic urine now for random test but this is making me question it!