Several studies have suggested that reduced social contact increases the risk of dementia and that social contact can help to enhance cognitive reserve, improving brain health and protecting against dementia. Social isolation could be a contributing factor in around 4% of dementia cases.
Scientists aren’t sure whether social isolation is a risk factor for dementia, or whether it’s a symptom of the condition. However, one thing is for certain: staying connected is good for brain health.
Dementia prevention, intervention, and care: 2020 report of the Lancet Commission.
Huang et al., Social isolation and 9-year dementia risk in community-dwelling Medicare beneficiaries in the United States, 2023.