Re: Question about n-acetyl-cystein

NAC boosts glutathione (detoxification) levels and is an heavy metal chelator (does not cross blood-brain barrier). It can boost the immune system by enhancing T-Cell production.

You could be experiencing an Herxheimer reaction or "die-off" if you prefer. What is your dosage? You might try lowering it.

It increases cysteine levels in the body which is not a good thing for everybody, I don't remember why.