depending on the person, this doesnt slways work, but it works for me with probation cup tests: a few hours before your test drink water nonstop until you urinate every five minutes, and an hour or 45 minutes before your test, drink a couple monster energy drinks and take a couple multivitamins. I dunno if this is the best choice for a company lab test, but every time they send mine to the labs they come back cool.