I had alot of amalgams and took NAC and I havnt had any symptoms or suide effects...I actually felt my head fog to clear up and I also supplemented with ALA which is meant to be avoided but I didnt know at the time as they dont state it on the products and the people who work at the health store said no you dont need to worry about it if you have amalgams.

But be careful because if its tru wat bex says than PLEASE stop it if you feel worse.