i have to pass an at home test on tuesday the fourth so i can go in to the military next week thursday for my drug test for meps... i smoked last night and hadnt smoked since monday... i bought niacin and this strip natural cleanser... i work out every day by running and pushups and sit ups, and drink a lot of water... i dont know how much ishould take of the niacin and if it will work? can someone help me?