Staying Social Linked With Slower Memory Decline in Older Adults

By: Oluwasola Samuel, Freelance health writer. Medically reviewed by: A. Odutola, MBBS, PhD, FRCSEd.

Photo of three older African women posing together, smiling. Click on image to enlarge.

Introduction

Picture a sunny Sunday afternoon. Grandma is back from her place of worship and greeting her neighbours. She stops to chat with an old friend who sells wares across the street. They both laughed and had a hearty discussion. Afterwards, she went home to call her daughter who lives abroad. 

The above scenario looks like another normal day for older adults, right? New research suggests these small moments of connection may be doing more for her brain than we appreciate

A study published in August 2026 followed thousands of older adults for 8 years to find out if staying social makes a difference to how the brain ages. The results provide hope and give families a fresh reason to value the everyday habit of staying connected.

So does socialising really slow down brain decline, or is there more to the story? 

Let's break down what the study found, and what it may mean for families in the sub-Saharan Africa region.

About the Study

Researchers wanted to know if being socially active could help older adults keep their memory and thinking skills sharper for longer. To find out, they followed more than 6,000 older adults in the United States, all aged 65 and above, for 8 years.

At the start of the study, each person answered questions about how social their life was. 

This covered things like:

• Whether they were married or living with others

• How often they went out for entertainment, like a movie or an event

• Whether they belonged to any social clubs, or took classes

• How often they attended religious services

• How often they visited family and friends

• Whether they worked for pay or did volunteer work

• Whether they still drove themselves places

Based on their answers, each person was given a social engagement score. The researchers then tracked their memory, thinking, and planning skills every year for the next 8 years, to see who declined faster and who stayed sharper for longer.

People who already showed early signs of memory decline at the start of the study were left out. This helped researchers get a clearer picture of what happens to people who start with a healthy brain as they age.

What the Study Found

Older adults who were more socially active at the start of the study showed a slower decline in memory and thinking skills over the next 8 years, compared to those who were less socially active.

The researchers looked at three separate skills, and social engagement was linked to slower decline in all three:

• Memory: Remembering names, recent events, and everyday details

• Orientation: staying aware of the date, time, and surroundings

• Executive function: Planning, organising, and making decisions

This means that the more socially active the participants were, the better they held on to these thinking skills as the years passed. The link was strongest for memory and orientation, and still present, though slightly smaller, for planning and organising skills.

This adds to a growing pile of evidence that an active social life may go hand in hand with a healthier, slower-ageing brain, alongside other habits that support healthy brain ageing.

What the Study Means for Africans

The good news for many African families is that staying social is not something new to learn, because it is already part of our daily life.

Think about the extended family system, where grandparents live with or near their children and grandchildren. Where people gather in religious places of worship every week. Also think about village meetings, cooperative societies, and market women's associations. These are all forms of social engagement that the study noted as helpful for brain health.

This means that the social habits many in sub-Saharan Africa already have are worth protecting and encouraging, especially as families become busier these days. Understanding the health risks of social isolation can help families spot when a loved one is quietly withdrawing.

Here are simple, low-cost ways to keep older loved ones socially engaged:

• Encourage regular visits from children, grandchildren, and neighbours

• Support their attendance at their place of worship or community meetings

• Set up video calls for relatives living abroad or in other cities

• Involve them in family decisions and gatherings, not just as observers

• Help them join or stay active in local clubs, cooperative groups, or associations

For adult children living far from ageing parents, this is also a gentle reminder that a regular phone call or video chat supports your parent's brain health too. It's one small part of supporting a parent's cognitive health as they age.

Limitations of the Study

Before drawing big conclusions here, it's important to understand what this study can and cannot tell us.

First, this was an observational study and not an experiment. 

Researchers watched what happened to people over time; they didn't test socialising as a treatment. This means the study can show that social engagement and slower brain decline go together, but it cannot prove that socialising itself caused the slower decline.

Second, social activity was only measured once, at the very start of the study. Life changes. People who were social in 2011 may have become more isolated, or more social, over the following years, and the study didn't track that.

Third, other factors could be part of the picture. People with better overall health, more education, or financially buoyant may naturally find it easier to stay socially active, and these same factors are also linked to healthier brain ageing on their own. The study didn't fully separate how much of the effect came from socialising itself versus other factors like physical activity and other healthy lifestyle habits known to slow cognitive decline.

This study does not prove that socialising alone can prevent dementia or guarantee a sharper brain in old age, but it gives us a strong reason to value staying social.

Wrap Up

So, does socialising slow brain decline? 

Yes, there is a link. Socialising is linked to a slower decline in memory and thinking skills, and that is a meaningful finding on its own, even if it's not a guaranteed cure or prevention.

What this means for you is simple. Encourage the older people in your life to visit family, attend religious worship centres, join community groups, and stay connected to people they love. These small, everyday habits may be doing more for their brain than anyone realised.

Brain health, like most things worth having, is built through small, consistent habits. Staying social is one habit worth holding on to.

Source: Felix C, Pomeroy ML, Bell T, Kollasserry FJ, Parisi JM, Albert SM, et al. Social engagement and brain structure?informed cognitive domain trajectories in older adults: The National Health and Aging Trends Study. Alzheimer’s & Dementia. 2026 Aug;22(8):e71689. doi:10.1002/alz.71689. Available from here

Related: Dementia: What Africans need to know

Published: August 24, 2026.

© 2026. Datelinehealth Africa Inc. All rights reserved.

Permission is given to copy, use and share content for non-commercial purposes without alterations or modifications and subject to source attribution.