I know that a strong dose of niacin will shock your liver, cranberry juice will flush your liver and AZO will clean your urinary track makeing for clean pee.
Niacin and AZO does nothing to rid the body of THC. Like the detox products mentioned above, its the fluids that youve consumed with these products that dilutes the THCA concentration in your bladder to the point where the urine sample registers below the cutoff levels of the drug screen. Cranberry juice, being a fluid, only dilutes the THCA concentration as well. You wouldve passed anyway just on the fluid-loading alone and without the niacin or AZOs to go with it.
The only other trick worth anything is to soak your funger in bleach for a few hrs before the test and then pee over your finger tio into the jar....then wash the shit out of it!!
This "trick" will not work either as the collection facilities, following the guidelines mandated by the DHHS, will make you wash your hands before you go into the bathroom to give your sample.