I hope this does not quite qualify for the "no drug testing questions allowed" rule. Apologies if it is. Anyway, why do people think that it works for clearing THC out of the system? Does it even work? I've heard all over the net that it doesn't, but I have friends that say they smoked pot the night before a drug test, took a shitload of niacin, and then passed the test the next day. I'm really confused.