Not only does fiber help keep you regular which is important because the body gets rid of some THC metabolites through the liver via feces. While in the colon the body can reabsorb some of the metabolites so by using fiber you can reduce the time and the possibility that THC metabolites will be reabsorbed. Also, by using soluble fiber such as metamucil the solbule fiber will absorb bile acids from the stomach and intestine. Your liver has to replace these bile acids so it makes more bile acid from cholesterol and this process can help remove some of the THC metabolites in the blood. This shifts them from being released by the kidneys and to the liver.

Dave try to get clean and learn how they will do the random process by going through it once without subbing. Then you can see if subbing will be possible. This way you can see if you will have enough time to warm a bottle of Quick Fix to temp and not be seen doing it. QF is stable at room temp for about 18 months so you could store it someplace safe and maybe when you are told you have been choosen they will be giving you enoguh time (which your body is a strong heater and will bring that bottle up to temp within 30 min-1 hour) to sneak the bottle into your pants and wait around to give them your clean sample.