You want to make sure you are taking a GC/MS test, and not an assay screen when using the Urineluck additive. The additive won't work on screens because it takes about an hour and 1/2 to get rid of the THC in the sample.
Labs are also testing for additive useage, using dipsticks that check for excessive nitrites, and for the presence of Glutaraldehyde, and Pyridinium Chlorochromate, in which most additives on the market contain.

If you are not sure what kind of test youre taking, then use the quickfix urine instead. It works on both screens and GC tests :thumbsup: