Ellen Kamhi talks with Greg MacPherson, a pharmacist and author of “Harnessing the Nine Hallmarks of Aging: to live your healthiest life.” His research has focused on the aging process at the cellular level. This work led him to discover ways to harness the nine identified, scientific hallmarks of aging, which is the premise of his book that addresses the natural aging process, how to age more favorably and simple strategies to slow the aging process and build a functional longevity plan.