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Body composition changes in anorexia nervosa

A Polito¹, M Cuzzolaro, A Raguzzini

¹National Institute of Nutrition, Rome, Italy.

European Journal of Clinical Nutrition

|October 2, 1998

Summary

This summary is machine-generated.

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Anorexia nervosa (AN) significantly reduces body fat and muscle mass, with bone mass also slightly decreased. Recovery primarily involves fat gain, with muscle mass lagging in the medium term.

Area of Science:

Nutritional Science
Human Physiology
Clinical Medicine

Background:

Anorexia nervosa (AN) is characterized by severe underweight and body composition alterations.
Understanding these changes is crucial for effective treatment and recovery monitoring.

Purpose of the Study:

To evaluate body composition changes in women with anorexia nervosa.
To assess body composition shifts during medium-term recovery from AN.

Main Methods:

A descriptive study comparing women with AN (BMI < 17 kg/m²) to controls and recovered individuals (BMI > 18.5 kg/m²).
Body composition assessed using underwater weighing, urinary creatinine, bioelectrical impedance analysis, anthropometry, and dual photon absorptiometry.

Main Results:

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AN patients exhibited significantly lower weight, BMI, body fat, and muscle mass compared to controls.
Total body water percentage was higher in AN, with altered extra/intra-cellular water distribution indicated by a lower phase angle.
Recovered patients (R-AN) gained primarily fat mass; muscle mass and phase angle remained suboptimal compared to controls.

Conclusions:

Anorexia nervosa involves significant deficits in body fat, muscle mass, and slightly reduced bone mass.
Medium-term recovery is characterized by preferential fat regain, with muscle mass recovery lagging, suggesting a need for targeted nutritional and therapeutic interventions.