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How loneliness speeds ageing and raises dementia risk, and tips to prevent it

Studies show that higher levels of loneliness and social isolation – especially in older adults – are linked to greater dementia risk

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Thinking you are old - or accepting the ageism that society thrusts upon you - can become a self-fulfilling prophecy, so you will be less likely to try new things. This can lead to a higher risk of developing dementia, according to research. Photo: Shutterstock
This is the 55th instalment in a series on dementia, including the research into its causes and treatment, advice for carers, and stories of hope.
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My mother often spoke of feeling lonely. Her depression, which began in her late 30s, would have been isolating. It kept her from working full time, so she missed out on the company and camaraderie often brought by a job.

My father died in a traffic accident when my mother was in her early 40s. She never remarried or had another partner.

When she was widowed, my siblings and I were all off at school or college, so she had little company at home.

A nine-year study published in early 2023 concluded that the risk of developing dementia over the period of the study was 27 per cent higher among socially isolated older adults compared with those who were not.
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Older adults sometimes live alone. They may have smaller – or no – social circles, have stopped working and have mobility issues, so they do not get out much. In short, they have limited opportunity to socialise, which is vital for our brains.

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