New research links the people who stress us out to changes on a cellular level, suggesting that persistent negative social ties speed biological aging. The study measured molecular markers across a community sample and found consistent associations between having a difficult person in your network and higher inflammation, worse mental health, and more chronic conditions. The results do not prove cause and effect, but they raise clear questions about how relationships shape long-term health.
Researchers gathered data from more than 2,000 adults in a Midwestern sample and looked for reports of “hasslers”—people who regularly create stress or conflict in someone’s life. Nearly three in ten participants said they had at least one hassler in their social circle. The team compared those reports with biological measures designed to estimate cellular aging rather than just counting years lived.
Scientists used DNA-based biological clocks to track age-related molecular changes and tied those measures back to social reports. Each additional hassler a person reported was linked with about a 1.5% faster pace of aging and roughly a nine-month increase in biological age. Those shifts also coincided with elevated inflammation markers and a higher load of chronic health problems.
Certain groups were more likely to name hasslers: women, daily smokers, people in poorer health, and those with adverse childhood experiences. The pattern suggests these relationships do not hit everyone equally and may intersect with other vulnerabilities. That makes the social risks of hasslers especially important to understand for prevention efforts.
Not every negative tie mattered the same way. Blood relatives and non-blood relations both showed harmful associations, while spouse hasslers did not emerge as significant in the same way. The authors suggested that family hasslers can be harder to avoid, acting as persistent stressors that accumulate over time.
“These findings together highlight the critical role of negative social ties in biological aging as chronic stressors, and the need for interventions that reduce harmful social exposures to promote healthier aging trajectories,” the researchers wrote in the study abstract. Study co-author Byungkyu Lee of NYU’s Department of Sociology said bluntly, “We are surrounded by those who make our lives difficult and cause problems,” and added, “We found that they are not just stressful; they are associated with measurable acceleration in biological aging at the molecular level, along with higher inflammation, depression, anxiety and chronic disease burden.”
The team discussed practical implications without overstating certainty, noting that reducing contact with consistent sources of conflict “may benefit health” in some situations. They also acknowledged that cutting ties is often unrealistic when those people are family or are woven into daily life. Faced with that reality, researchers and clinicians should focus on tools to manage stress and improve interaction patterns inside unavoidable relationships.
“Many of these relationships involve family members or others who are deeply embedded in daily life, so the challenge is often not simply avoiding them, but finding healthier ways to manage them,” he said. “More broadly, our results suggest that the overall balance of one’s social network matters.” Beyond individual coping strategies, the authors pointed to community programs that widen social circles as potential buffers against chronic relational stress.
“Broadening and diversifying one’s network may be one way to offset some of the biological toll associated with chronic relationship stress,” Lee added. Activities such as shared hobbies, volunteering, or mutual aid can introduce positive ties that dilute the influence of negative ones and create healthier social balance. Those approaches may be especially useful where family ties can’t be severed and stressors are ongoing.
The study comes with caveats: it is cross-sectional, draws from a single regional sample, and relies on self-reported social experiences that could reflect mood or perception. Those limits mean the findings show association, not proof that hasslers cause faster aging. Still, the study highlights a clear biological link worth following up with longitudinal work and broader samples to better guide public health responses.
