09/01/2026
A Harvard study on happiness has found a correlation between mental acuity later in life and the strength of nurturing relationships early in life.
Numerous studies have pointed to evidence that the more you use your brain, the healthier it stays for longer.
As a result, we tend to think about doing puzzles, learning new things, and challenging ourselves through work as being the sorts of mental activity that keeps us “brain fit”.
But one extended study has found a correlation between long-term brain function and the positivity of relationships.
An 80+ year Harvard study on happiness, which involved researchers following participants into their 90s, found that many of the usual suspects – blood pressure, BMI, even education – didn’t reliably predict who stayed mentally sharp.
But emotional warmth did.
Those who reported more nurturing relationships early in life were over five times more likely to maintain cognitive health into very old age.
In other words, you can help your kids have healthier brains for longer by giving them love, encouragement, support, and safety in their formative years.