A new UK study reveals a stark double-edged effect of caregiving on cognitive health. While providing 5 to 9 hours of care per week may enhance brain function through mental stimulation and a sense of purpose, those who care for 50+ hours experience accelerated cognitive decline.
The research, led by Dr. Baowen Xue of University College London, compared 2,765 carers aged 50 and older with a similar group of non-carers. Participants averaged 60 years old, with 56% being women. The study focused on executive function-decision-making and multitasking-as well as memory.
Key findings indicate that low-intensity caregiving, especially outside the household, provides cognitive stimulation that helps maintain mental sharpness. In contrast, high-intensity carers-often full-time and socially isolated-face burnout, loneliness, and disrupted sleep, compounding negative effects on cognition.
According to the 2021 UK census, 5.8 million people provide unpaid care, with 1.7 million doing so for at least 50 hours weekly. Carers UK reports that 74% of caregivers feel stressed or anxious, and 40% feel depressed.
Researchers call for better support from government, local councils, and the NHS to provide funded formal and replacement care for intensive carers, warning that by 2040, 20% of English adults will live with major illnesses, increasing reliance on unpaid family caregivers.