 This systematic review examines the impact of social activities, social networks, and social support on cognitive functioning in healthy older adults, 50+. The study collated data from randomized controlled trials, genetic, and observational studies. Evidence suggests that social activity is positively associated with global cognition, overall executive functioning, working memory, visual spatial abilities, and processing speed but not episodic memory, verbal fluency, reasoning, or attention. Social networks are positively associated with global cognition but not episodic memory, attention, or processing speed. Social support is positively associated with global cognition and episodic memory but not attention or processing speed. Composite measures of social relationships are positively associated with episodic memory and verbal fluency but not global cognition. The findings suggest that social relationships have a positive impact on cognitive function in healthy older adults, but the exact nature of this association remains unclear. Future research is needed to further explore these associations and their underlying mechanisms. This article was authored by Michel E. Kelly, Holly Duff, Sara Kelly, and others. We are article.tv, links in the description below.