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As with all drugs, there is a certain amount of variability between individuals in the rate of metabolism of meth. Consequently, the period of detection can vary from 1 to 4 days in the urine, with most people being in the middle of this range, so can be detected for 2-3 days. In the saliva, it is detectable for 1-3 days. It is impossible to know the period of time for an individual until that person has been tested.
There is no clinical evidence that the Herbal Clean Carbo will accelerate the clearance of the meth from the body. Or more specifically, there is no evidence that this product works better than drinking a good amount of fluids. Drinking a good amount of fluids will not accelerate the clearance of the drug from the blood, but it will flush the kidneys and dilute the urine, and for someone that is close to the threshold of detection, this may be enough to help. Even this intervention can be overdone, as excessively dilute urine will be a red flag for the testing lab, so you should not be drinking more than about 2-3 liters per day.
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