The original poster of that thread is talking about how he believes it takes 8-9 years (!) to solve the problem and if you go back and look at old posts dating back years, heavy metals has been brought up several times.
Also, I searched and remember reading about how the heavy metals we come in contact with even through dentistry should have a negligible effect on us. What I wonder is if mercury fillings are so toxic why do they have an effect on only a small number of people? This is how I came to the conclusion that there must be something else that is affecting these people (unprocessed trauma) that is exacerbated by the heavy metals.
If you search heavy metals and PTSD, you can find other evidence of how they are linked. This is how I came to the conclusion about heavy metals being a symptom. I did the same thing with Lyme and Candida which I posted about earlier. It seems the more I research, the bigger the scope is.