Will niacin flush free do the same effects as regular nician to detox from thc? Please help me docs!

Yes & no. Yes, flush-free niacin will do the same thing as regular niacin to detox from tetrahydrocabinnol, which is to say NOTHING. Neither form of niacin will do anything to clear marijuana from your system. Nor will any over-the-counter dietary supplement, much less prescription medication. TIme to get THC out of the body depends upon how often someone is exposed. Best to just stop if need to pass test.