I assume you'll get a hair test that includes essential elements such as TEI or DDI, etc. I strongly suggest that you also evaluate your hair test according to Andy Cutler's theory about mercury's effects on movement of elements into hair. It is his view that when Hg is fouling up the movement of minerals, the hair test is not so useful for determining which ones you need to take or avoid. We discuss this in the Cutler Chelation group here and in certain yahoo groups.