Hair Test Interpretation: Finding Hidden Toxicities is a practical book. The book starts out telling you how to interpret a hair test for mercury and other heavy metals. It provides a step by step discussion of this with figures to make this easy to do. It gives examples using actual hair test results from real people. Mercury interferes with how the hair element results come out ? mercury is often low and other minerals take unusual values. It is crucial for proper hair test interpretation to know how to recognize mercury’s characteristic signature. Mercury often causes retention of certain minerals. Arsenic, antimony, tin, titanium, zirconium and aluminum are elements many people retain too much of when they really have a mercury problem. Hair tests are worth doing because a surprising number of people diagnosed with incurable chronic health conditions actually turn out to have a heavy metal problem. Heavy metal problems are easy to correct. Hair testing allows the underlying problem to be identified and the chronic health condition often disappears with proper detoxification.