Most dementia research stops in the early eighties. A new Lancet Healthy Longevity study followed 805 adults who were already 90 or older — and found that risk does not level off, while the best-known Alzheimer’s risk gene did not predict who developed dementia.

A new 20-year Brandeis study shows that expecting to age well predicts fewer physical limitations and a longer life — because a positive outlook drives healthier habits.

Extensive research demonstrates that quitting smoking provides significant health benefits for older adults, even for those who have smoked for decades. These benefits span mortality reduction, cognitive preservation, cardiovascular health, and quality of life.