SWIM has a drug test a week from now and Is wondering his chances of passing. He's a heavy user who smokes $50-$100 of weed a week with 3-4 friends at a time. He quit smoking May 25th to prepare for his drug test, since then he's drank good amounts of water, worked out daily (cardio), drank vinegar, etc. He also plans to buy and take some niacin in the next couple days and take 500mg-750mg daily to help clear up his system. Do you think he will pass his drug test?