‘…[I]n a study of otherwise healthy, normal teens who self-reported various negative interpersonal interactions, researchers found that a greater frequency of such stress was associated with higher levels of an inflammatory marker called C-reactive protein, or CRP. CRP has been identified as an indicator for the later development of cardiovascular disease (CVD).

“Although most research on stress and inflammation has focused upon adulthood, these results show that such links can occur as early as the teenage years, even among a healthy sample of young men and women,” [an investigator] said. “That suggests that alterations in the biological substrates that initiate CVD begin before adulthood.” ‘ via Science Daily.