Just wanted to add a little something to this while we're on the subject of drug testing misconceptions.

I hear people saying a lot, "Just drink a lot of water and excersise before your test."

This is an excellent way to flush your system naturally, but only if done right. I'm not sure if this has been pointed out on this board or not, but I'll lay it out anyways...

Increasing metabolism is the only way you are going to get rid of the byproducts of THC. So, this means either excersise a lot, drink a ton of caffiene, or eat large amounts of food for a few days before your test.

The only problem here (and something to keep in mind), all of these things are ejected from the body through your urine and sweat. Mostly urine though. If you smoke today and expect to pass a drug test in a few days by excersising and drinking water, you may be screwing yourself over.

The most common thing people do that I've seen when they fail tests is that they go out and sweat like crazy the day before their test. This is fine and dandy. It gets rid of the metabolites, but at the wrong time. If you burn fat and metabolites today, you will more that likely still be urinating them out tomorrow. This will make your urine even more possitive than it already is.

My advice to anyone wanting to flush their system....

If you have more than a week - excersise up until 48 hours before your test. Then take it easy and just drink a ton of water. Eat plenty of food over the last 24 hours and you should be good. This is assuming you are an occational smoker.

If you have less than a week - don't sweat at all. Try to take it as easy as possible. Drink lots of water.