As a long time smoker I can attest to this, but not as miraculous as high niacin doses with NAC.
Yes, I wish we could tolerate Niacin. Both my husband and I took the regular flush kind, from Life Extension. The reactions we both had, (beyond the normal flushing), did not dissipate, and after a while it was getting worse, so we both took some benadryl to stop the reactions. Maybe the Niacin was too old or something, but I am scared to try it again. I’m sad because it sure does sound really good to take.