I have to take a drug test at a Concentra clinic and my only 3 options are substitution, quick fix synthetic urine, or niacin. My concerns are if i use my gfs urine would birth control show up and they would fail me for being a male? Does quick fix show up on concentra tests as non human urine leading to a fail? And does niacin work? Or any detox pill/drink for that matter? Im just really stressing over this because i really need this new job! thanks in advance everybody! smoke on!