Study Reveals Childhood Loneliness as a Risk Factor for Dementia
Research shows that feeling lonely during childhood can increase the risk of developing dementia in later life, even if the sense of loneliness decreases in adulthood.
A recent international study revealed that childhood loneliness plays a significant role in raising the risk of dementia in adults over 50. The study found that perceived loneliness, rather than the actual number of friends, had the greatest impact. Children who experienced loneliness were more likely to show cognitive decline later in life, even if they felt less lonely as adults.
Childhood is a critical period for brain development, making children more vulnerable to psychological stress such as neglect, poverty, bullying, and food insecurity. The study analyzed data from over 13,592 participants between 2011 and 2018, finding that about half reported feeling lonely and lacking close friends during childhood.
Results indicated that those who experienced early loneliness began midlife with lower memory and cognitive skills, and these abilities declined faster over time. Adults who had felt lonely were 51% more likely to develop dementia, while those who experienced a lonely childhood had a 41% higher risk.
Researchers suggest that loneliness acts as a chronic psychological stressor, triggering hormones harmful to memory centers and limiting social interaction needed to build strong neural networks. The study also noted increasing rates of loneliness among children and adolescents, including 73% of girls aged 11–13 and over a quarter of boys aged 11–17.
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