Hair analysis is a useful tool to see how well you absorb essential minerals and what levels of toxic minerals have accumulated in your tissues. Hair is cut as close to your head as possible -- only the 1 to 2 inches which grew close to your head will be tested because it reflects your mineral status over the past few months. The lab burns your hair in an electrochromatography scan to measure the levels of minerals present. Low levels of six or more essential minerals indicate a problem with absorption of nutrients. This could be due to drug therapy, dysbiosis, low hydrochloric acid levels, poor flora. Hair analysis is also an accurate test to determine whether you have high levels of toxic minerals like aluminum, arsenic, cadmium, lead, and mercury. It is also recognized tool for detecting lead poisoning in children.