snowbird,
I had a hair test done. It showed very low levels of heavy metals, and no mercury, but my minerals were very derranged.
I also had a unprovoked urine test which showed high aluminum, cadmium, and barium. Nutrients were again derranged but not really close to the hair test.
hth some.

I just did a DMSA challange test a few days ago and get results next month to see what turns up.
My selenium was also nill to nothing as well Bex .
hth some.