Related Experiment Videos
Thyroid function in bulimia nervosa
A R Spalter1, H E Gwirtsman, M A Demitrack
1Clinical Neuroendocrinology Branch, National Institute of Mental Health, Bethesda, Maryland.
Biological Psychiatry
|March 15, 1993
Summary
This study found that bulimia nervosa patients have altered thyroid function, with triiodothyronine (T3) levels decreasing after abstinence from binge-purge behaviors. Caloric intake impacts T3 levels in these patients.
Area of Science:
- Endocrinology
- Psychiatry
- Metabolic Disorders
Background:
- Bulimia nervosa involves binge eating and purging, often associated with altered metabolic rate.
- Thyroid hormones significantly influence metabolic rate, but their role in bulimia nervosa is debated.
- Previous studies present conflicting data on thyroid function in patients with bulimia nervosa.
Purpose of the Study:
- To investigate thyroid function in patients with bulimia nervosa.
- To clarify the relationship between thyroid indices and metabolic rate in this population.
- To examine changes in thyroid function during abstinence from binge-purge behaviors.
Main Methods:
- Thyroid indices (T3, thyroxine, thyrotropin) were measured in 18 patients with bulimia nervosa at admission and after 3 weeks of abstinence.
- Thyroid indices were compared between patients and 28 control subjects.
- Correlations between thyroid indices and nutritional intake/body weight were analyzed at abstinence.
Main Results:
- Patients with bulimia nervosa had normal thyroid indices at admission, with slightly lower triiodothyronine (T3) compared to controls.
- After 3 weeks of abstinence, significant decreases in T3 and thyroxine, and an increase in thyrotropin were observed.
- Abstinence T3 levels correlated positively with caloric and macronutrient intake and inversely with body weight percentage.
Conclusions:
- Binge-purge behaviors in bulimia nervosa may temporarily elevate thyroid indices and metabolic rate.
- Reduced T3 levels after abstinence could be due to decreased caloric intake or hypothalamic-pituitary dysfunction.
- Thyroid function and metabolic rate regulation are complex in bulimia nervosa.