text: It depends on how much THC was used and for how long a period.  A small amount, one time, and you should be clean in a few days.  A moderate amount to larger amounts over a longer period of time, will result in significant quantities of THC being absorbed by the fat in your body.  The THC in the fat will then start leeching out over a period of time.  This process is commonly described as taking about a month to get rid of all of the absorbed THC.