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Decrease in resting metabolic rate during abstinence from bulimic behavior.

M Altemus1, M M Hetherington, M Flood

  • 1Clinical Neuroendocrinology Branch, NIMH, Bethesda, MD 20892.

The American Journal of Psychiatry
|August 1, 1991
PubMed
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Bulimia nervosa can increase metabolic rate due to binge eating and vomiting, potentially involving thyroid hormones. Abstinence from these behaviors leads to a significant decrease in metabolic rate and thyroid hormone levels.

Area of Science:

  • Endocrinology
  • Nutritional Science
  • Psychiatry

Background:

  • Bulimia nervosa is an eating disorder characterized by cycles of binge eating and compensatory behaviors.
  • The metabolic effects of binge eating and vomiting are not fully understood.
  • Thyroid hormones play a crucial role in regulating metabolic rate.

Purpose of the Study:

  • To investigate the impact of binge eating and vomiting on resting metabolic rate.
  • To examine the relationship between thyroid hormone levels and metabolic rate in women with bulimia nervosa.
  • To assess the metabolic changes during a period of abstinence from binge eating and vomiting.

Main Methods:

  • Studied eight normal-weight women diagnosed with bulimia nervosa.
  • Monitored resting metabolic rate, triiodothyronine (T3), and thyroxine (T4) levels.

Related Experiment Videos

  • Compared measurements during a 1-week period of binge eating and vomiting with a subsequent 7-week period of abstinence.

    • Main Results:

    • Resting metabolic rate significantly decreased during the 7-week abstinence period.
    • Levels of T3 and T4 hormones also fell significantly during abstinence.
    • These findings suggest a temporary increase in metabolic rate associated with binge eating and vomiting.

    Conclusions:

    • Binge eating and vomiting in bulimia nervosa may temporarily increase metabolic rate.
    • Increased thyroid hormone activity might contribute to the elevated metabolic rate during binge-purge cycles.
    • Abstinence from binge eating and vomiting leads to a normalization of metabolic rate and thyroid hormone levels.