Study links volunteering to slower cognitive decline

A study published in September 2026 in Alzheimer's & Dementia suggests that volunteering may slow cognitive decline in individuals carrying a genetic variant linked to Alzheimer's disease.

Genetic risk factor identified

The research, led by Sae Hwang Han from the University of Texas at Austin and Jessica Faul from the University of Michigan, analyzed data from 17,972 adults over 22 years. Nearly a quarter of the participants carried one copy of the APOE ε4 variant, and 2.3% carried two copies.

APOE ε4 gene and Alzheimer's

This gene is the most significant hereditary risk factor for late-onset Alzheimer's disease and is associated with faster memory and reasoning deterioration, particularly after age 70. No medication has been effective in slowing this decline.

Data from long-term survey

The study used data from the Health and Retirement Study, a large American survey that re-interviews the same adults every two years since 1998. By observing participants before and after they began volunteering, researchers compared each participant to themselves, excluding lifestyle effects.

Volunteering linked to cognitive benefits

The findings indicate that formal volunteering, such as within charitable, religious, or educational organizations, for less than four hours per week could delay the onset of cognitive impairments by nearly two years.