Another thing that you should consider is your level of physical activity and your fiber intake. Have you been exercising enough for the past two week? Now is the time to do a lot of cardio and eat a lot of leafy greens and other foods that contain fiber. You cannot merely rely on liquid dilution or over the counter products.

Hit the treadmill, ride your bike, get a good workout and sweat a lot. I mean do this today, tomorrow and every day until your test. This will kick start your metabolism and assist the detox agents in the flushing. Think of it like you are a boxer cutting weight for a fight, except that you will continue replenishing your liquids.