Psychological adversities are associated with accelerated epigenetic aging: systematisk översikt and metaanalys

Guo and colleagues reviewed 22 studies of psychological adversity and DNA-methylation age acceleration from midlife onward. Fifteen studies met the review’s high-quality classification. The pooled associations were consistent for second-generation clocks, especially PhenoAge and GrimAge. Loneliness was associated with higher age acceleration, with β=0.07 and 95% CI 0.06 to 0.08. Depression showed β=0.08 and 95% CI 0.04 to 0.13. Stress showed β=0.10 and 95% CI 0.03 to 0.16. Heterogeneity was low for loneliness, moderate for depression, and substantial for stress. The paper addresses a longevity-relevant biomarker, not lifespan or disease incidence. It does not show that distress causes faster aging. It also does not show that therapy or stress reduction reverses a clock. The authors identify limited evidence for anxiety and underrepresentation of non-Western populations. The useful result is the consistency across different adversities and second-generation clocks. The practical limit is that the underlying studies are observational and the effect sizes are small. This supports psychosocial health as a plausible aging correlate, not as a validated anti-aging treatment target.

Psychosocial stress, depression, and loneliness are each associated with accelerated aging from midlife onward. Notable gaps include the lack of studies examining anxiety and underrepresentation of non-Western population. Whether alleviating psychological adversities translates into decelerated aging trajectories requests future intervention studies.