Thanks for the caution about the DMPS challenge test! I was a little wary of it to begin with, but that frightens me even more!

I've been advised away from the hair test, because similar to the blood test, it only tests for very recent exposure to mercury, while it is still fresh in your system. It can't test for the mercury that is stored in your bones and tissues, where mercury has a tendency to accumulate. So if you haven't been recently exposed, it might not detect anything, or it might only detect small amounts. Since I'm concerned more with my overall mercury (and other metal) levels, rather than recent exposure, I'm not sure where that leaves me....What is the oral DMPS you mentioned? I don't know if I've heard about that one before.

Thanks,
~Tia