Associations between social connections and cognition: a global collaborative individual participant data meta-analysis

This individual participant data meta-analysis examined how social connections impact cognitive decline in aging. Using data from over 38,000 participants worldwide, the study found that good social connections—living with others, frequent social interactions, and community engagement—are linked to slower cognitive decline in areas like memory and language. Conversely, loneliness and poor social ties accelerated cognitive decline. The findings underscore the importance of social-engagement for maintaining brain health and preventing dementia.

To protect cognitive health as you age, foster strong social connections by regularly engaging in community activities, maintaining close relationships, and reducing loneliness. Aim for weekly interactions with friends or family and participate in social groups. While evidence is strong, the study cannot confirm causation, so combine this approach with other healthy lifestyle habits.