I have read Hal Huggin's 'It's all in your head' and it is all true. There is no doubt that he is very knowlegeable about mercury fillings and their disastrous effect on health.

I'm not quite so sure that Huggins is so knowlegeable about chelation however, and the protocol he has given you (DMSA x3 a week) is likely to redistribute mercury, rather than get it out of your body. For chelation many of us follow the Cutler protocol on this forum

http://health.groups.yahoo.com/group/frequent-dose-chelation/

This is felt to be one of the safest protocols. It would be a good idea to research your chelation options before starting out.

Hope this helps

Nicola