There seems to be two things that may chelate mercury out of the brain: ALA and cilantro. See http://www.newconnexion.net/article/05-04/cilantro.html for info on cilantro.

When I used Cutler's protocol I couldn't continue, probably because I started at too high a dose with DMSA and it seems to have interfered with my phase I and II liver function, and by the time I reduced my dose it seems the damage was done. Now I can't seem to use anything but Algin and supportive supplements.

I did try fresh cilantro recently to restart the process, as per the link above, but it was a pretty rough ride too, probably because my body load of mercury is too high.

Use ALA or cilantro too soon without reducing the body load first and it can redistribute mercury back into the body and brain and seems to be rather dangerous for some of us.

If you are really mercury toxic don't start ALA too soon, but it also seems to be needed to get mercury out of the brain, in its own time.