Aging isn’t just about getting older—it’s about how well your cells function over time. Why do some people maintain boundless energy, sharp cognition, and resilient bodies well into old age, while others experience decline far too soon? It all comes down to the 12 hallmarks of aging—biological processes like DNA damage, mitochondrial dysfunction, inflammation, and cellular senescence that gradually erode health. But what if we could slow those processes down? When I interviewed @JulieGibsonClark