A January study in the journal Social Science & Medicine found that volunteering slows down aging in retirees: the DNA of people who volunteered the equivalent of one to four hours a week showed distinctive biomarkers associated with decelerated epigenetic aging, with the most pronounced effects among retired people.

“People might do better, physically, psychologically, socially, if they have a role that they think is important and they identify with,” said Cal J. Halvorsen, a gerontological social work scholar at Washington University in St. Louis and one of the authors of the study. “In the American context, we take our jobs very seriously, and so we were curious if volunteering after retiring or when you’re no longer working might have a different effect on your epigenetic aging.”

That study is just part of a growing body of research on the health benefits of volunteering for retirees, a major benefit for older Americans who have mobilized for election defense and other core public services under attack. Another study published in February found that volunteering in early retirement among Americans also reduced rates of depression by around 10 percent—again, a more pronounced effect than in the general population.

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