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Area of Science:

  • Developmental Psychology
  • Epigenetics
  • Social Neuroscience

Background:

  • Adolescence is a critical period for developing peer relationships, focusing on autonomy and relatedness.
  • Early social experiences may have lasting impacts on physical health, including biological aging.

Purpose of the Study:

  • To investigate if struggles in establishing peer autonomy and relatedness during adolescence and early adulthood predict advanced epigenetic aging.
  • To determine the association between early social difficulties and epigenetic age at 30.

Main Methods:

  • Longitudinal observation of 154 participants (ages 13-29) with friends and partners.
  • Assessment of friendship quality, attachment state of mind, and social integration.
  • Epigenetic age acceleration measured at age 30, controlling for covariates.

Main Results:

  • Difficulty in establishing peer autonomy and relatedness from ages 13-18 predicted greater epigenetic age at 30.
  • Attachment insecurity and adolescent social integration difficulties also linked to accelerated epigenetic aging.
  • Adolescent social factors uniquely contributed to explaining epigenetic age acceleration, independent of smoking history.

Conclusions:

  • Adolescent peer relationship quality is a significant predictor of long-term biological aging.
  • Early social challenges have lasting implications for physical health trajectories.
  • The adolescent focus on peer relationships may be evolutionarily functional for long-term well-being.