Hair Analysis for Heavy Metals

[jcmom]

Has anyone had this test done on their child? If so, do you believe this test is credible? I had this test done on my 4yo boy and it returned results that showed he had high levels of lead in his body. I quickly followed that up with a blood test which showed that his lead was in the normal range. My naturopath wants to start chelation therapy but I just don't know if we should do that based on the hair analysis test alone. Thoughts?