Her creatine levels could be too low. Load up now on creatine so that it can show up through her dilution period (water loading). If she's heavy, STOP exercising NOW. THC is stored in fat, and when fat is burned it releases it back into your system for disposal. I'm not sure if all the crap from GNC is necessary. That stuff is not going to eleminate the THC that is already in her system (not in the short run). Her only safeguard would be to drink her water, teas, juice, etc., along w/ the vitamins on the day of the test. Again, that cleansing stuff you're buying at the nutritional store is NOT a quick fix for THC. Doesn't hurt to clean though. Don't forget the creatine. good luck.