05/27/2025
New study shows marriage is linked to a higher risk of developing dementia.
The findings are the result of an 18-year study published in Alzheimer's & Dementia.
Researchers from Florida State University and the University of Montpellier found that older adults who were divorced or never married had a lower chance of getting dementia compared to those who were married.
The study followed more than 24,000 people who were dementia-free at the start and tracked their health for up to 18 years.
About 22% of married people developed dementia during the study, while only around 13% of divorced and never-married people did. Even after taking into account age, health problems, lifestyle habits, and genetic risks, the results stayed the same.
The researchers also found that unmarried people were less likely to develop Alzheimer’s disease and Lewy body dementia, but marriage did not seem to affect the risk of other types of dementia like vascular dementia. Interestingly, unmarried people were also less likely to go from mild memory problems to full dementia.
These findings challenge the long-standing belief that marriage always helps protect brain health.
Other research has suggested that it may not be marriage itself, but the strength of a person's social connections, that matters most for brain health.
A 2022 study published in Frontiers in Aging Neuroscience found that people with strong social networks — whether they were married or not — had better cognitive health and a lower risk of dementia. This means that for married people, staying socially active and emotionally connected could still offer important protection for the brain, even if marriage alone does not guarantee it.
learn more: https://alz-journals.onlinelibrary.wiley.com/doi/10.1002/alz.70072