Super-agers retain cognition through lifestyle

Dear Doctors: I keep hearing the term “super-ager,” but the meaning isn’t clear. I’ve heard it used about older adults who stay physically healthy, who live to be 100 or who have a good memory. Is there a definition? Is someone a super-ager because of lifestyle or genetics?

Dear Reader: The secret to a long and healthy life has always been a subject of intense fascination.

From the age-old legend of…