Go down 4 subjects and there is a discussion on it.
Hair analysis is not that great in terms of detecting heavy metals unless you getting constant exposure. Metals embed in tissue and reside there until provoked. There are heavy metal challenge tests that can be done at an alt doctor - Doctors Data does this test.
ARL and TEI are inverse in the idea of copper toxicity. TEI says that you are copper toxic when high levels show up on hair testing which is the standard thinking. If you have questions about copper then doing a serum test along with the hair test should help you understand. Copper can be toxic in some people, however copper is also a vital mineral that supports many metabolic functions such as cytochrome c, immunity and other conditions. Trying to chelate copper when it is low would be an error. I know someone whose practitioner did this and the outcome was worse than the start.