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Assessment of Glutamine as a Fuel Source for Alveolar Macrophages Exposed to Chronic Ethanol Using an Extracellular Flux Bioanalyzer

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The energetics of nut consumption.

Richard D Mattes¹

¹Purdue University, Department of Foods and Nutrition, 700 W. State St. W. Lafayette, IN 47907-2059, USA. mattes@purdue.edu

Asia Pacific Journal of Clinical Nutrition

|May 28, 2008

Summary

Despite being energy-dense, moderate nut consumption is linked to lower BMI. Studies show nuts promote satiety, increase energy expenditure, and have limited energy absorption, largely offsetting their caloric content and preventing weight gain.

Area of Science:

Nutrition Science
Dietary Studies
Human Health

Background:

Nuts are nutrient-dense foods containing vitamins, minerals, fiber, protein, and phytochemicals.
Nuts may improve postprandial lipid profiles and offer other health benefits.
Nuts are energy-dense, theoretically contributing to weight gain.

Purpose of the Study:

To investigate the association between nut consumption and body mass index (BMI).
To explore the mechanisms behind the observed inverse relationship between nut intake and weight gain.
To evaluate the impact of nut consumption on satiety, energy expenditure, and energy utilization.

Main Methods:

Review of epidemiological studies on nut consumption frequency and BMI.
Analysis of intervention trials assessing weight changes with nut inclusion in diets.

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Examination of physiological responses including satiety, energy expenditure, and energy absorption.

Main Results:

Epidemiological studies consistently show an inverse association between nut consumption and BMI.
Intervention trials indicate less weight gain than predicted when nuts are included in the diet.
Mechanisms include strong satiety effects (offsetting 65-75% of energy), increased energy expenditure (approx. 10%), and limited energy absorption (5-15%).

Conclusions:

The combined effects of satiety, increased energy expenditure, and reduced energy absorption largely account for the energy provided by nuts.
Current evidence suggests that moderate nut consumption does not contribute to weight gain.
Findings support the inclusion of nuts in dietary strategies for weight management.