From what I understand the Quickscreen tests use the same cut off as LabCorp. Labcorp does not have some sort of secret sorcery that makes their system better than anyone elses. Standard Immunoassay.

Think about Wal Greens marketing a product, there has to be validity to the fact its accurate. Also, quick screen says that the lines for marijuana will always be lighter then their other tests.
mhjtc4689 Reviewed by mhjtc4689 on . Employment Drug Test I must say, I learned a lot on this site. I have been a smoker for many years and quit for 4 months. Then started again at least 4 -8 blunts a week. The last day I smoked was July 4. I went ahead and purchased Test Pure just incase I have a job interview coming soon and now I do next week. I am an avid Surf Fisherman so I sweat a lot here in sunny Florida. What is your thought about me passing with Test Pure or is the THC still hanging out in my fat cells. I am 6'1 200 pounds. Thanks for Rating: 5