In a longitudinal cohort study of 123 participants followed from adolescence to age 30, early adolescent interpersonal aggression independently predicted accelerated biological aging—measured using composite biomarker algorithms—even after adjusting for demographic factors, baseline health, and adolescent body composition. These associations appeared to be mediated by persistent conflict with fathers and punitive peer behaviors, which were also linked to higher adult body mass index, suggesting that early-life relational stress may contribute to long-term cardiometabolic and systemic aging risk.

Source: Health Psychology