i took a pre-employment test yesterday...it was my second one for same job as a detox drink came up invalid...anyone know why??? i assume creatinine....i overnighted quick fix 5.7 batch F4P-09...the temp was good and i filled to the line...i am now nervously waiting the results...my question is if i needed the canadian version although test was in U.S. Also, whats the deal about the IgG test to determine synthetic urine??