YES, most likely: The active ingredient (the one that makes you high) THC ,and its metabolic byproducts, can be detected in the urine for up to 30 days in a heavy and/or regular user of marijuana. In extreme cases, such as very heavy use combined with recent weight loss and concentrated urine, THC may be detected up to 45 days but probably below the cut-off value that would be considered "positive."
Answered 7/20/2014
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