I got sick within hours when taking MSM (within a weeks after my removal (2000). When I cut the dose in half, the symptoms declined to about half and when I went off it completely (just a few days later), the symptoms went away by the next day.

I have read research about the interactions that take place between mercury and sulphur, and root canals and the bacteria that usually reside below them.

Although sulphur is very important in the body, I believe that you have to be careful with it if you're mercury toxic.