Can drug test determine the last time you used weed? As in if you were a smoker for a month and were smoking about 1.5 grams a day and would test positive for a drug test a month later but they cant tell the difference if the weed was smoked a month ago or a day ago?
Yes. A hair folicle(spelling?lol) test will come out like a graph and show when you have smoked weed.