Hair mineral analysis (HMA) is a safe, noninvasive test that measures the levels of nutrients and toxic metals found in hair. Hair mineral analysis can detect whether there is an excess or deficiency of vital nutrient minerals such as calcium, potassium, zinc and iron. It can also identify over-exposure to toxic metals such as aluminum, lead, arsenic and mercury. HMA is an invaluable screening tool in both every day and preventive healthcare. For most people the main route of exposure to the toxic elements is through the diet. Consequently, information concerning dietary intake is of the utmost importance in being able to assess risks to human health.