The Power of Cumulative Social Advantage

A study published in the Proceedings of the National Academy of Sciences on October 26, 2023, suggests that the accumulation of social advantages over a lifetime-including supportive childhood relationships, strong friendships, community involvement, adn religious participation-is associated with slower biological aging.Researchers found that individuals with richer and more consistent social connections exhibited a younger biological age,as persistent by analyzing DNA methylation patterns. PNAS Study

Unlike previous research that often examined social factors in isolation-such as marital status or number of friends-this study conceptualized “cumulative social advantage” as a multifaceted construct. By combining relational resources from both early and later life,the researchers created a measure that reflects how advantages cluster and reinforce each other over time. this approach provides a more holistic understanding of the impact of social connections on health.

“What’s striking is the cumulative effect – these social resources build on each other over time,” saeid lead author Dr. Emily Ong, an associate professor of sociology at Pennsylvania State University. “It’s not just about having friends today; it’s about how your social connections have grown and deepened throughout your life.That accumulation shapes your health trajectory in measurable ways.”

Epigenetic Clocks and Biological Age

The study utilized “epigenetic clocks” to measure biological age. These clocks analyse DNA methylation patterns-chemical modifications to DNA that don’t change the DNA sequence itself but can influence gene expression. Changes in methylation patterns accumulate over time and are influenced by both genetic and environmental factors, including lifestyle and social experiences. Nature article on epigenetic clocks

Researchers found that individuals with higher levels of cumulative social advantage had epigenetic profiles indicative of a younger biological age. This suggests that strong social connections may protect against some of the biological wear and tear associated with aging.