According to one study this factor is associated with a 31% higher risk of developing dementia.
Feeling lonely can weigh heavily on the heart as well as the mind. Research published in nature mental health A worrying link has recently been confirmed: loneliness is associated with an increased risk of dementia compared to other factors such as smoking or a sedentary lifestyle.
With more than 600,000 participants, this study highlights an important issue: preserving strong social bonds to maintain good cognitive health.
Loneliness, an underestimated risk factor
Unlike social isolation, which refers to a lack of physical contact, loneliness is a subjective experience. This happens when distance comes between our relationships and the people we love. Even when surrounded, we can feel deeply lonely if our emotional needs are not met.
According to this meta-analysis, people who feel lonely are 31% more likely to develop dementia. This link persisted even after taking into account factors such as social isolation, depression, or physical health problems like high blood pressure.
Why does loneliness affect the brain?
Several mechanisms may explain this association. On the one hand, loneliness reduces cognitive stimulation. People living alone participate less in social or intellectual activities, which can weaken their mind. On the other hand, chronic loneliness is linked to persistent stress and inflammation, two factors known to damage brain cells.
Additionally, behaviors adopted by lonely people, such as unhealthy diets or lack of exercise, increase the risk of cognitive decline. These habits may also explain why loneliness is linked to specific types of dementia, such as vascular dementia, which is affected by cardiovascular health.
possible prevention
The results of this study highlight the importance of promoting feelings of social connectedness for preserving cognitive health.
Participating in community activities, maintaining meaningful relationships, and staying socially active can help reduce these risks.