toxic & essential hair elements test doctor's data nutritional / essential elements: calcium, magnesium, sodium, potassium, copper, zinc, manganese, chromium, vanadium, molybdenum, boron, iodine, lithium, phosphorus, selenium, strontium, sulfur, cobalt, iron, germanium, rubidium, zirconium. toxic elements: aluminum, antimony, arsenic, barium, beryllium, bismuth, cadmium, lead, mercury, platinum, thallium, thorium, uranium, nickel, silver, tin, titanium