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Folate Content and Chemical Composition of Commercially Available Gluten-Free Flour Alternatives

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Abstract

Concerns about the nutritional and sensory qualities of gluten-free (GF) products has generated interest in the evaluation of novel gluten-free ingredients. Folate content is of particular interest due to limited sources of enriched folic acid in a GF diet as well as lack of nutrient composition data in novel flours. The aim of this study was to determine the total folate content and chemical composition of GF flours commercially available in Canada. A tri-enzyme method was used to extract folate from the flour samples, and a microbiological assay was used to measure the total folate contents. The chemical compositions of the GF flours were determined according to standard Association of Official Agricultural Chemists (AOAC) International methods. Compared to all-purpose flour, 265 ± 6.9 μg/100 (dry-weight basis), chickpea flour registered the highest folate content 451 ± 10.8 μg/100 (dry-weight basis) followed by quinoa flour, 174 ± 12.4 μg/ 100 g folate (dry-weight basis). Fonio, had a total starch content of ~77% but was not a source of folate. Flaxseed, chickpea, chia and coconut flours had the highest reported protein contents (mean value: 21.3 ± 1.3%) whereas flaxseed (~42%), and chia (~35%), had the highest lipid content. These findings may inform the selection of gluten-replacement flours with acceptable nutritional properties.

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Acknowledgments

A University Council on Research (UCR) grant to J. Jamieson and M. English assisted in the completion of this study. The authors also wish to acknowledge the dedicated work of research assistant Jacqueline Rusin.

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JA Jamieson: Conceptualization, Writing- Original draft preparation, Supervision, and Resources. L. Viana: Methodology, Investigation, Writing and Reviewing; M. English: Conceptualization, Writing- Major Reviewing and Editing, Data Curation, Formal Analysis, and Supervision.

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Correspondence to Jennifer A. Jamieson.

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Jamieson, J.A., Viana, L. & English, M.M. Folate Content and Chemical Composition of Commercially Available Gluten-Free Flour Alternatives. Plant Foods Hum Nutr 75, 337–343 (2020). https://doi.org/10.1007/s11130-020-00833-z

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