Estimating Serving Sizes for Healthier and Unhealthier Versions of Food According to Canada’s Food Guide

Publication: Canadian Journal of Dietetic Practice and Research
9 October 2015

Abstract

Purpose: Canada’s Food Guide (CFG) defines food serving sizes and recommends a specific number of servings from each of the 4 food groups. However, there is no differentiation in serving sizes for different versions of foods that may differ in nutritional value.
Methods: Participants (n = 20) estimated serving sizes of “healthier” and “unhealthier” versions of milk, bread, cereal, potatoes, chicken, fish, and juice and reported the amount normally consumed in 1 sitting.
Results: Participants estimated unhealthier servings of cereal and juice to be smaller than healthier servings, but estimated unhealthier servings of chicken to be larger than healthier versions (P < 0.05). There were no differences for bread, milk, potatoes, and fish. Accordingly, estimated servings of juice (P < 0.01) had more calories than the unhealthier orange drink. There were no caloric differences for cereal (P = 0.12), but an estimated serving of bran flakes had more fat and fibre than frosted flakes cereal.
Conclusions: In contrast with CFG, which does not account for different versions of food, certain unhealthier foods were estimated to be smaller or larger than the healthier versions. However, both healthy and unhealthy serving sizes still tended to be larger than what is prescribed in CFG. Thus, better education or revision of serving sizes in future editions of CFG may warrant consideration.

Résumé

Objectif. Le Guide alimentaire canadien (GAC) définit la taille des portions alimentaires et recommande un nombre précis de portions pour chacun des 4 groupes alimentaires. Toutefois, il n’existe aucune différentiation dans la taille des portions pour différentes formes d'aliments dont la valeur nutritive pourrait varier.
Méthodes. Les participants (n = 20) ont estimé la taille des portions de lait, de pain, de céréales, de pommes de terre, de poulet, de poisson et de jus sous des formes « plus saines » et « moins saines », et indiqué la quantité normalement consommée au cours d’un repas.
Résultats. Les participants ont estimé que les portions de céréales et de jus non sains étaient plus petites que leur forme saine, contrairement à ce qu’ils ont estimé pour le poulet, pour lequel les portions non saines étaient considérées plus grosses que pour la forme saine (P < 0,05). Il n’y avait aucune différence pour le pain, le lait, les pommes de terre et le poisson. Ainsi, les portions estimées de jus (P < 0,01) contenaient plus de calories que le jus d’orange non sain. Il n’existait aucune différence calorique pour les céréales (P = 0,12), mais une portion estimée de flocons de son contenait plus de gras et de fibres que des flocons de céréales givrés.
Conclusions. Contrairement à ce qui est indiqué dans le GAC, qui ne prend pas en compte les différentes formes d’aliments, les portions de certains aliments moins sains ont été considérées comme plus petites ou plus grosses que leur forme plus saine. Cependant, la taille des portions tend toujours à être plus importante que celle indiquée dans le GAC, quelle que soit la forme, soit plus saine ou moins saine. En conséquence, il serait pertinent d’envisager une meilleure sensibilisation à la taille des portions ou une révision de celles-ci dans les éditions à venir du GAC.

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References

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Information & Authors

Information

Published In

cover image Canadian Journal of Dietetic Practice and Research
Canadian Journal of Dietetic Practice and Research
Volume 76Number 4December 2015
Pages: 204 - 207

History

Version of record online: 9 October 2015

Authors

Affiliations

Sina Parikh BSc
School of Kinesiology and Health Science, York University, Toronto, ON
Mazen J. Hamadeh PhD
School of Kinesiology and Health Science, York University, Toronto, ON
Jennifer L. Kuk PhD
School of Kinesiology and Health Science, York University, Toronto, ON

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