Burnt Toast" correct me if I'm wrong, but I hear that if you don't excersise much, then you can take omega-3 fatty acids'like fish oil to speed up your metabolism, which breaks down thc faster, but for the future, I would reccomend a daily dose'of fish oil to speed up your metabolism on a daily basis for future tests,
The downside to this if if a person has 1 week or less before the scheduled U/A, the last thing that person needs is to have his/her metabolism in high gear - particularly if that person hasnt been passing home tests. Its a common misconception that THC breaks down in the body. Thats not how the human body processes THC. THC is stored in the fat cells. When fat cells burn, the THC metabolites are released back into the bloodstream - they dont "break down" or "burn away" when fat cells burn. The kidneys filter the THC metabolites from the bloodstream and are deposited into the bladder for the eventual exit. This is the main reason why THC carries a longer detection period than other types of drugs.
So if a person is failing home tests and the scheduled U/A is less than 3 days away, then that person needs to make every effort to bring his/her metabolic rate to a crawl - curtail all fat-burning activities and be as dormant as possible until after the U/A. That way the person wont be releasing a bunch of THCA back into the bloodstream, which will end up in the urine to be detected.