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Research into food portion size: methodological aspects and applications.

Eva Almiron-Roig¹, Santiago Navas-Carretero, Peter Emery

¹Universidad de Navarra, Centre for Nutrition Research, Irunlarrea 1, 31008, Pamplona, Spain. ealmiron@unav.es.

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|December 9, 2017

Summary

Increasing food portion sizes contribute to overeating and obesity. This review examines methods for defining and measuring portion sizes to reduce confusion and standardize research on portion size effects.

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Area of Science:

Nutrition Science
Behavioral Science
Public Health

Background:

Rising obesity rates correlate with increased food portion sizes, a phenomenon known as the portion size effect.
Varied definitions and measurement methods for portion sizes create confusion among consumers and hinder research consistency.

Purpose of the Study:

To review definitions and research methodologies for evaluating portion-size related outcomes.
To provide a comprehensive overview of methods used in dietary assessment, cognitive analysis, and behavioral impact studies related to portion sizes.

Main Methods:

Literature review focusing on methods for estimating food intake, analyzing cognitive processes, and evaluating portion size manipulation impacts.
Special emphasis on behavioral studies examining cognitive aspects of portion size behavior.

Main Results:

Disagreements on portion size recommendations exist among various stakeholders (manufacturers, health professionals, policymakers).
Inconsistent research methods complicate cross-study comparisons and understanding of portion size effects.

Conclusions:

Standardizing definitions and methodologies for portion size research is crucial.
Clearer definitions and standardized methods will aid researchers, clinicians, and policymakers in addressing portion size effects and related behaviors.