I do hair analysis to find out heavy metal level found in tissue which is much more accurate than blood test. However, if your test shows VERY high in mercury, your blood test will show HIGH mercury in the blood test. Once mercury is out (takes a few weeks of IV treatment at toxicologist’s office) and very likely high in arsenic level comes up. Detoxifying heavy metal is like peeling onions; it is a process. Most of people need detox, and often proper food and supplement will do, but some people I need a toxicologist. These patient often “laugh” about hair analysis at the beginning, but once they found VERY high level in mercury, lead, arsenic, cadmium, aluminum in serum, they take very seriously and act very quickly.