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New study finds looking after grandkids can boost brain health — but there’s a catch

New study finds looking after grandkids can boost brain health — but there’s a catch

Looking after grandchildren could support memory and mental sharpness, research suggests.

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Ruairidh Pritchard

Published: March 2, 2026 at 11:47 AM

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Spending time with your grandchildren might do more than warm your heart. It could also help keep your mind sharp.

New research from the American Psychological Association suggests that grandparents who help care for their grandchildren show better memory and thinking skills than those who do not. The findings add weight to the idea that staying socially and mentally active in later life plays an important role in protecting cognitive health.

But before you sign up for full-time childcare duties, there is an important catch.

Grandparenting and brain health

The study, led by researcher Yadi Wang, analysed data from more than 6,800 adults aged 45 and over, using information from the China Health and Retirement Longitudinal Study.

It found that grandparents who provided childcare performed better in tests measuring memory and calculation skills than those who did not provide care.

According to the study, “Grandchild care has a significant positive effect on the cognitive function of older adults.”

The researchers link this to the well-established “use it or lose it” principle, which suggests that regularly engaging your brain through activity and interaction may help slow age-related cognitive decline.

Caring for young children involves problem-solving, multitasking, conversation, planning and emotional engagement. All of these can act as a form of mental workout.

The sweet spot: why moderate help matters most

Interestingly, the benefits were not unlimited.

The research identified what it describes as an inverted U-shaped relationship between hours spent caring and cognitive benefits. In simple terms, moderate levels of childcare were linked to the strongest improvements, while very high levels of care saw those gains taper off.

As the study explains, “The caregiving group exhibits… an inverted U-shaped relationship between care intensity and cognitive benefits, with moderate-intensity care providing the greatest cognitive improvement.”

This reflects a balance between stimulation and strain. Taking on a valued family role can boost wellbeing and engagement, but excessive responsibility may lead to stress and fatigue, both of which can affect health.

For many older adults, that finding will resonate. Helping out a few days a week may feel energising and purposeful. Becoming the primary carer, especially for long hours, can be a very different experience.

New carers may see the biggest boost

Another striking finding was that grandparents who had recently started caring for grandchildren appeared to benefit even more than those who had been doing so continuously for years.

The study found that both newly commenced care and continuous care were linked to improved cognitive function, “with newly commenced care demonstrating a more pronounced effect.”

This may be because starting a new role brings fresh challenges, learning and social contact. New routines, new school gates, new conversations and new games can provide a surge of mental stimulation.

Over time, however, novelty can fade, and practical pressures may build.

It is not just about babysitting

The researchers also looked at why grandparenting might be linked to better brain health.

Two key factors stood out.

First, grandparents who provided care were more likely to receive financial support from their adult children, which the study identified as a significant mediator. “Receiving intergenerational financial support” played a role in supporting cognitive outcomes.

Second, social participation was important. The research found that “participation in social activities” significantly mediated the relationship between grandchild care and cognitive function.

In other words, caring for grandchildren may naturally increase opportunities for social interaction, whether that is chatting to other grandparents at pick-up, attending school events or joining community activities.

Social engagement has long been linked to lower rates of cognitive decline and dementia. Staying connected matters.

What does this mean for grandparents?

While the study is based on Chinese data, its broader message aligns with international research on active ageing. Staying mentally engaged, socially connected and purposeful appears to support cognitive health.

That does not mean every grandparent must provide childcare to protect their brain. Volunteering, learning new skills, joining clubs or staying in work can offer similar stimulation.

But for those already helping with the grandchildren, the findings are reassuring.

Grandparenting is often framed as a selfless act of support for busy parents. This research suggests it may also offer something back.

The key takeaway is balance.

Offering help in a way that feels meaningful rather than overwhelming may provide both emotional fulfilment and cognitive stimulation. Protecting time for rest, hobbies and your own social life remains just as important.

As the study concludes, “Grandchild care overall significantly improves the memory and calculation abilities of middle-aged and older adults,” while also recommending “moderate care intensity” to maximise benefits.

Helping with the grandkids may not be a miracle cure for memory loss. But as part of an active, connected lifestyle, it could be one more reason to say yes to story time, school runs and a game of hide and seek.

Authors

Ruairidh PritchardDigital Growth Lead

Ruairidh is the Digital Lead on MadeForMums. He works with a team of fantastically talented content creators and subject-matter experts on MadeForMums.