Minerals are essential for life, not just yours and mine but all life, including all plants, animals, and even insects. Each of the macro minerals sodium, potassium, magnesium, and calcium, as well as the trace minerals iron, zinc. copper, chromium, manganese, molybdenum, selenium, and iodine must be consumed in the diet for optimum health.
Donald Rudin M.D., Ph.D., stated that metabolic performance declines 50% with the loss of just one of the trace minerals. The loss of only one of the macro minerals totally denies any cellular function as we know it.