New research links adolescent aggression to accelerated aging

A new study suggests that aggressive behavior during adolescence could have long-term effects on biological aging, potentially advancing the body’s age by decades.

Researchers, publishing their findings in Health Psychology, tracked adolescents from age 13 into adulthood, examining patterns of aggression, family conflict, and peer relationship problems. 

Using validated biological markers—including blood pressure, inflammation, blood sugar, cholesterol, and immune function—they estimated each participant’s “biological age” compared with their actual age.

The results showed that teens with higher levels of aggression exhibited signs of accelerated aging by midlife, in some cases appearing biologically up to 30 years older than their chronological age.

“Adolescents are often mocked for treating relationships as matters of life and death,” said Joseph Allem, lead researcher and professor of psychology. 

“Our study highlights that these early patterns of conflict can have long-lasting health consequences.”

Researchers suggest that ongoing stress from constant conflict—whether with family, peers, or romantic partners—may contribute to this accelerated aging, potentially increasing lifelong risks for conditions such as heart disease and diabetes.

The study also noted demographic trends: boys were more likely to experience conflict with fathers, and teens from lower-income families were more prone to act out against peers.

Allem emphasized that the findings do not prove a direct causal link between teenage aggression and faster aging. 

“Other factors we didn’t measure may also play a role. What seems to matter most is how these early behaviors evolve into relationship challenges later in life,” he explained.

The research underscores the importance of addressing social and emotional development in adolescence, as early patterns of aggression may leave lasting imprints on both mental and physical health.