We use only Trace Elements Inc. (TEI), because they do not wash hair samples. They also test for more minerals and metals than any other lab (37 vs. 23 with other testing labs). TEI was founded by Dr. David Watts, who helped pioneer many innovations in the study of trace mineral deficiencies and excesses and their relationship to various metabolic dysfunctions associated with illness.
What lab do you use for hair testing, and why?
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