The GABA system appears to be the target for mercury poisoning. This completely makes sense when you consider some of the sysmptoms of mercury poisoning are irritability, anger and neurvousness.

http://www.ncbi.nlm.nih.gov/entrez/...;list_uids=7641224&dopt=Abstract

I've noticed mood stabilization from taking supplements that increase GABA levels in the brain. Here are some:

-The supplement GABA doesn't cross the blood brain barrier very well but I have noticed improvement from taking it.

-L-Theanine is probably the best supplement for increasing GABA levels.

-Inositol is good too but it has an SSRI like effect which some people don't like.

All of the supplements are only temperary relieve of course.