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It takes about three to seven weeks to clear THC metabolites from your system, no matter what you do (or don't do). Heavy people take longer, as the fat cells store the metabolites. Flushing drinks like Palo Azul simply dilute your urine, hopefully enough to lower the concentration so that it is temporarily below the detection threshold. However, there are ways to determine if someone has been "water doping," and if one of those comes up positive it invalidates the test. Some agencies consider that a fail.

Best plan: stop using and try to get past the first one. Then stay stopped.

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10y ago

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