“…This transformational approach recognizes that multicomponent pharmacological, behavioral, or lifestyle interventions targeting biological aging upstream of disability 16 may help insulate older adults from the cascade linking biological aging to deficits to disability. If only a small trigger is needed to unbalance homeostasis in a highly vulnerable individual, while a major event may be withstood by someone more robust—how may we prevent vulnerability (i.e., frailty) or bolster those with frailty?…”