Assessment of Phenolic Compound Intake from Plant-Derived Products in Adolescents from Ontario, Canada

Publication: Canadian Journal of Dietetic Practice and Research
19 February 2020

Abstract

Purpose: To better understand which plant-derived products contribute to the usual daily total polyphenol content (TPC) intake of Canadian adolescents.
Methods: A convenience sample from 2 southwestern Ontario high schools was obtained (n = 108). Students of all gender and ethnicity were invited to participate if they were enrolled in grades 9–12 and were between the ages of 13 and 18 years. To measure the usual intake of TPC found in fruits, vegetables, fruit juices, nuts and legumes, tea, and coffee and coffee-based beverages, participants completed a food frequency questionnaire. TPC of the tea, coffee and coffee-based beverages, and fruit juices were determined spectrophotometrically, and the TPC of all other food items were calculated using the Phenol-Explorer Database.
Results: Participants’ median consumption of TPC was 974 mg/day (25th, 75th percentile; 559, 2161, respectively). Fruit contributed 69% to TPC intake with 24% from vegetables; 3% from juice; 2% from tea, coffee, and coffee-based beverages; and 0% from nuts and pulses. No sex differences were found.
Conclusion: The results of this exploratory study suggest that fruit is the major contributor to the daily TPC intake of adolescents in Ontario, Canada; however, a larger-scale study is warranted to confirm these findings.

Résumé

Objectif. Mieux comprendre quels produits végétaux contribuent à l’apport en quantité totale de polyphénols (QTP) quotidien habituel des adolescents canadiens.
Méthodes. Un échantillon de commodité provenant de deux écoles secondaires du sud-ouest de l’Ontario a été obtenu (n = 108). Des élèves de tous genres et toutes origines ethniques ont été invités à participer s’ils étaient entre la 9e et la 12e année de niveau scolaire et étaient âgés de 13 à 18 ans. Pour mesurer l’apport habituel en QTP que l’on retrouve dans les fruits, les légumes, les jus de fruits, les noix et les légumineuses, le thé, et le café et les boissons à base de café, les participants ont rempli un questionnaire de fréquence alimentaire. La QTP du thé, du café et des boissons à base de café, ainsi que des jus de fruits, a été déterminée par spectrophotométrie, et la QTP de tous les autres aliments a été calculée au moyen de la base de données Phenol-Explorer.
Résultats. La consommation médiane de QTP des participants était de 974 mg/jour (25e, 75e percentile; 559, 2161 respectivement). Les fruits contribuaient à 69 % de l’apport en QTP, suivis des légumes à 24 %; du jus à 3 %; du thé, du café et des boissons à base de café à 2 %; et à 0 % pour les noix et les légumineuses. Aucune différence entre les genres n’a été ciblée.
Conclusions. Les résultats de cette étude exploratoire donnent à penser que les fruits sont le principal contributeur de l’apport quotidien en QTP des adolescents de l’Ontario, au Canada; cependant, une étude à plus grande échelle est nécessaire pour confirmer ces résultats.

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Financial support: This study was funded by a Brescia University College research grant and by the Canadian Federation of University Women.
Conflicts of interest: The authors declare that they have no competing interests.

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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 81Number 3September 2020
Pages: 146 - 149

History

Version of record online: 19 February 2020

Authors

Affiliations

Sara Michelle Weinman MScFN, RD
School of Food and Nutritional Sciences, Brescia University College, London, ON
Danielle S. Battram PhD RD PHEc
School of Food and Nutritional Sciences, Brescia University College, London, ON
Latifeh Ahmadi PhD
School of Food and Nutritional Sciences, Brescia University College, London, ON

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