I know this an old thread but Ill add in case someone is bored like me and reading thru: Havent taken a piss test in some time but when I did...
mid 20's. Over 6', just under 200lbs. I was a daily smoker. Worked out everyday. Ate really really clean on a regular basis. Lots of fluids. I would say my metabolism is fast. 24 hours before my test I would not smoke, eat fatty, not work out, and take a store bought dilution kit and passed every time. Naturally Klean is the product. still have one in the cupboard just for an emergency! Hope this helps!