Does niacin pills with no flush washes thc out of your systrm?

i know people who swear they assed short notice pee tests this way

i also know a guy who used it and failed

Okay my friend , first you must realize that several diffrent tests exist to check for THC in your urine......
Niacin, in fact is a detox that will rarely clean your system of THC- yet the reason many people swear by it is that they used niacin and were able to get a clean result. HOW? I will tell you.... Because they drank a whole hell of alot of water before taking the whiz quiz and if you drink enough water prior to testing (a 1 gallon milk jug drank 2-3 hours before testing seems to work good) and pissed as much as they could on the morning of the test.
Once your system has been flooded with enough water your kidneys will in effect (temporarily) shut down and your piss will literally be pure water ..... This can be dangerous and is not health but does work against unconstitutional laws. What are you going to do?
Golden seal, Niacin and a plethora of other (supposed) remedy's can be discarded as an urban legend (just ask any one of the number of inmates who are in jail for violating probation....They believed the myth as well.)
If you have some money and are taking a test for work (where they wont stand there and watch you piss) I would recommend an additive such as Urine Clear (but the additives all seem to work on the same principle so don't worry about brand names.) I have a ton of friends who are truckers and subject to random tests and they all carry a bottle of additives on them for emergency's. I have used additives as well and they work great.,.... Remember to keep the small bottle taped against your body (to maintain body temp.) Duct tape it to your inner thigh (the bottle is small , about like a visine bottle but made of glass.)....... Dump it in the urine cup, take a piss, swirl it around and keep your job.
Hope this helps.