Niacin is a myth. It does nothing to help pass a U/A.

There is no product that can rid the body of THC. Only time and exercise can do this.

Drinking water/fluids is only helpful on the day of the U/A. Drinking a bunch of water days or weeks before the U/A is of no help. It may cause frequent urination, but it has no effect on the rate in which the kidneys filter the THCA from the bloodstream. As long as youre burning fat cells, you'll be releasing THCA into the bloodstream, to where the kidneys pick them up and deposit them into the bladder - thus being detected on a U/A.

Drinking fluids are helpful on "D-Day" because youre effectively diluting the THCA concentration thats present in the bladder - to where the sample registers below the cutoff thresholds of the drug screen. This action is only temporary. Once all of the fluids taken in had been all urinated out, the "dirty" donor will resume testing positive for THC.