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Welcome back to the NDS Video Blog Series. Today, in this video, well be discussing cut off levels. At NDS, we get a lot of phone calls and emails asking about cut off levels in general and also for specific substances and tests. Since cut off levels can vary from test to test, it can sometimes get misunderstood, so lets start with the basics and then well dive into some specifics. In drug testing, a cut off level is established to determine when a test will be positive for illegal drugs. The lab analysis measures the amount of the drug metabolite in the specimen at the time of testing. Using the established cut off level means that a small trace of the metabolite is permitted to be present in a specimen and the test result still be reported as negative. Every benefit of the doubt is given to the donor. In marijuana testing, for example, the cut off levels have been chosen in order to prevent false positives based on second hand smoke and other factors. For opiate testing, the cut o
