These shampoos show a average reduction of %6 for cocaine to %36 THC and this is why some will say they passed with a shampoo, BECAUSE THEY WERE NOT THAT DIRTY TO BEGIN WITH . This is why all shampoos at best are %30 average and only if your barley over cut off will that %30 get you a negative most who pass from aloe rid type shampoos didnt need anything
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