In the words of the late author and noted researcher, Dr. Henry Schroeder, trace elements (minerals) are "...more important factors in human nutrition than vitamins. The body can manufacture many vitamins, but it cannot produce necessary trace minerals or get rid of many possible excesses."
Hair Tissue Mineral Analysis
Hair tissue mineral analysis (HTMA), is an analytical test of 35 elements within the hair. A HTMA reveals a unique metabolic world: intracellular activity, which cannot be seen through most other tests. This provides a blueprint of the biochemistry occurring during the period of hair growth and development.