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Eating behavior in bulimia nervosa: multiple meal analyses

M M Hetherington1, M Altemus, M L Nelson

  • 1Clinical Neuroendocrinology Branch, National Institute of Mental Health, NIH, Bethesda, MD.

The American Journal of Clinical Nutrition
|December 1, 1994
PubMed
Summary

Individuals with bulimia nervosa exhibit disordered eating patterns, consuming significantly more calories and fat than healthy controls. Binge eating and purging behaviors were frequently observed, with mood improvements noted after purging.

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Area of Science:

  • Clinical Psychology
  • Nutritional Science
  • Psychiatry

Background:

  • Bulimia nervosa is an eating disorder characterized by recurrent episodes of binge eating and compensatory behaviors.
  • Understanding the specific eating patterns and nutritional intake of individuals with bulimia nervosa is crucial for effective treatment.

Purpose of the Study:

  • To investigate and quantify the eating behaviors, energy intake, and macronutrient consumption in individuals with bulimia nervosa.
  • To compare these patterns with those of age, sex, and weight-matched control subjects.

Main Methods:

  • Ten individuals diagnosed with bulimia nervosa were admitted to an inpatient unit for 7 days of observation.
  • Ten age, sex, and weight-matched control subjects were admitted for 4 days.
  • Detailed records of food and fluid intake, binge eating and purging frequency, and appetite/mood ratings were collected daily.

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Main Results:

  • Bulimic patients displayed highly variable and chaotic eating patterns.
  • Total daily energy intake was substantially higher in bulimic patients (10,034 kcal) compared to controls (1,924 kcal).
  • Bulimic patients consumed less protein and more fat, binged 1.6 times daily, purged 3 times daily, and experienced mood improvement after purging.

Conclusions:

  • Bulimia nervosa is associated with significantly elevated energy intake and altered macronutrient profiles, particularly higher fat consumption.
  • The observed eating behaviors, including frequent bingeing and purging, contribute to the disorder's complexity.
  • Mood regulation appears to be a factor, with purging providing temporary mood enhancement.