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Bone health in eating disorders.

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Summary

Eating disorders (EDs) significantly impair bone health in adolescents and young adults, leading to low bone mineral density (BMD). Recovery requires nutritional rehabilitation and weight restoration for improved bone accrual and reduced fracture risk.

Keywords:
Adolescentsanorexia nervosaboneeating disordersendocrinology

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Area of Science:

  • Endocrinology
  • Bone Biology
  • Adolescent Medicine

Background:

  • Eating disorders (EDs) pose a significant risk to bone health in adolescents and young adults.
  • Low bone mineral density (BMD) in EDs results from impaired peak bone mass accrual and bone loss.
  • Bone complications include fractures, stress fractures, kyphoscoliosis, and height loss, with potential for persistent deficits.

Purpose of the Study:

  • To elucidate the impact of eating disorders on bone health in adolescents and young adults.
  • To identify the mechanisms contributing to bone loss in anorexia nervosa (AN).
  • To review the effectiveness of current treatment strategies for improving BMD in ED patients.

Main Methods:

  • Review of existing literature on eating disorders and bone health.
  • Analysis of factors influencing bone metabolism in anorexia nervosa.
  • Examination of clinical presentations and diagnostic criteria for bone impairment in EDs.

Main Results:

  • Anorexia nervosa (AN) is associated with low bone turnover, characterized by increased bone resorption over formation.
  • Bone loss in AN affects both trabecular and cortical bone, with trabecular bone being more vulnerable.
  • Key contributing factors include malnutrition, low weight, reduced fat mass, hormonal deficiencies (estrogen, androgen), excess glucocorticoids, and impaired GH/IGF-1 axis.

Conclusions:

  • Bone loss in AN may be irreversible even after clinical recovery.
  • Hormonal therapies show limited effectiveness in improving BMD.
  • Increased caloric intake, weight gain, and resumption of menstruation are crucial for enhancing BMD in ED patients.