I don't understand why people risk not getting hired over spending $20-25 to definitely, positively pass.
I don't put much stock in niacin, drinking tons of water, drinking bleach (yes, I've heard it), cranberry juice, etc etc. Sure, you'll see honest people on the interwebs talk about their friend that did it and passed, and how they did it and passed as well, but oddly never provide scientific reasoning to back it up.
Truth: it's stored in your fat and as you burn through it, will secrete it in your urine.
Spend the $20 and rest peacefully knowing that you WILL pass.
Oh, again, I passed the day after a weekend of smoking. I drank soda and was lazy all weekend. Let's not take into consideration that I probably don't any body fat at all to store the shit, just drink soda and be lazy instead. It worked for me