The Canadian version of the QF contains a vial of crystals that need to be added to the QF after pouring into the sample cup. According to Spectrum Labs, the vial of crystals are required "to get past the additional integrity checks of Canadian drug testing".

For QF users residing in the US, the QF 4.0 is still fine as long as the batch number does not end in 05 and earlier. It is NOT necessary to use the Canadian batch.
Burnt Toast Reviewed by Burnt Toast on . Class 3 Medical Exam... Hey. I have been smoking weed for about five months everyday. I have a class 3 medical exam in about one and a half months. The reason why I am getting a medical exam done on me is because I am going to get my PPL (Private Pilot's License) soon and I am going to have to pass this test before I am able to obtain this license. I read a lot of threads and I know there are a lot of people here who could help me out. I just want to ask a few questions. Should I stop smoking bud now? It Rating: 5