This month, we continue our conversation with Andrea Rosanoff, Ph.D., about the great importance of the mineral magnesium. In Part One (February 2015), we discussed the importance of magnesium for producing the energy needed for most of the body’s life processes. In Part Two (March 2015), we chatted about how magnesium is needed for the utilization of vitamin D, itself an extremely important vitamin/hormone. This biochemical importance begs the question: Does magnesium make a measurable difference in terms of health and longevity? This month, Dr. Rosanoff discusses the role of magnesium and longevity.