I used A. Cutler's protocol for heavy metal detox. He thinks hair is not a good way to test sodium status in the body. However he thinks ratios of calcium, magnesium sodium and potassium can suggest a need for more support for adrenals or thyroid, etc.
Was your sodium and potassium both on the high side of normal and magnesium and potassium on the low side?
In the detox groups when we see indications of chronic mercury toxicity and somewhat elevated arsenic we usually see reports of chemical and food sensitivities . The combination of toxins seems to damage liver function.