I'm taking a 24 hour urine heavy metal test starting tomorrow. Thank you for posting this. In my research I found out the same thing about heavy metals. Deficits and over exposure can cause a lot of problems that mimic neurological diseases. They may cause these conditions for all we know. Check out my response on the thread "Final Results for MS Testing." I explain why I am doing the testing and provided a link to a thread where a lady having neuro problems was from Mercury poisoning and was getting better after detoxing. I also bought a kit to check my city water supply to test for lead and other chemicals, and some in house mold tests too. That may be over the top (it sounds crazy, I know ) but since my girlfriend and my pets both use the same water source and we live in the same environment I would like to know it's safe either way. THANKS AGAIN!