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Influence of Processing Methods on Food Components and Glycaemic Index of Cassava-based Traditional Foods

Received: 29 November 2019     Accepted: 21 December 2019     Published: 10 March 2020
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Abstract

Processing methods affect starch hydrolysis, digestibility, absorption and glycaemic index (GI) of food. Although some studies have reported on the effect of boiling, frying, roasting and baking on glycaemic index of traditional staples, there is limited information on the contribution of drying, fermentation, boiling and steaming on starch bioavailability and glycaemic index. This research work aimed at determining the effect of fermentation, steaming, boiling and drying on starch bioavailability and predicted GI of some cassava-based traditional foods consumed in Ghana. The total starch, amylose, amylopectin, dietary fibre and predicted glycaemic index of the intermediate and finished products were determined according to standard protocols. The analysis established that steaming and boiling increase GI of foods, fermentation has no significant influence on predicted GI of fermented steamed products, and drying has no substantial effect on predicted GI of cassava flour. However, staples or products prepared from solar dried cassava flour would have higher predicted GIs than those of sun dried cassava flour. This work has also provided evidence in support of the fact that total starch and amylopectin give rise to an increase in GI whereas amylose and dietary fibre contents contribute to a decrease in GI of foods. The predicted GIs of raw cassava, boiled cassava (ampesi), akyeke, cooked kokonte with sun dried flour and cooked kokonte with solar dried flour were found to be (47.75%), (77.30%), (79.05%), (40.20%) and (61.11%), respectively. Temperature plays a significant role in breaking hydrogen bonds in food molecules causing the release of glucose and subsequently affecting GI. The GI data of these staples may be used in conjunction with other food composition tables for healthy food choices and nutritional counselling. Processors can incorporate more fibre or amylose-containing crops into food products as well as ensure the use of sun or solar drying to produce low glycaemic index food products.

Published in Journal of Food and Nutrition Sciences (Volume 8, Issue 1)
DOI 10.11648/j.jfns.20200801.12
Page(s) 6-14
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Processing Methods, Cassava-based Traditional Staples, Starch Digestibility, Glycaemic Index

References
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    Yaw Gyau Akyereko, Faustina Dufie Wireko-Manu, Ibok Oduro. (2020). Influence of Processing Methods on Food Components and Glycaemic Index of Cassava-based Traditional Foods. Journal of Food and Nutrition Sciences, 8(1), 6-14. https://doi.org/10.11648/j.jfns.20200801.12

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    ACS Style

    Yaw Gyau Akyereko; Faustina Dufie Wireko-Manu; Ibok Oduro. Influence of Processing Methods on Food Components and Glycaemic Index of Cassava-based Traditional Foods. J. Food Nutr. Sci. 2020, 8(1), 6-14. doi: 10.11648/j.jfns.20200801.12

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    AMA Style

    Yaw Gyau Akyereko, Faustina Dufie Wireko-Manu, Ibok Oduro. Influence of Processing Methods on Food Components and Glycaemic Index of Cassava-based Traditional Foods. J Food Nutr Sci. 2020;8(1):6-14. doi: 10.11648/j.jfns.20200801.12

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  • @article{10.11648/j.jfns.20200801.12,
      author = {Yaw Gyau Akyereko and Faustina Dufie Wireko-Manu and Ibok Oduro},
      title = {Influence of Processing Methods on Food Components and Glycaemic Index of Cassava-based Traditional Foods},
      journal = {Journal of Food and Nutrition Sciences},
      volume = {8},
      number = {1},
      pages = {6-14},
      doi = {10.11648/j.jfns.20200801.12},
      url = {https://doi.org/10.11648/j.jfns.20200801.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jfns.20200801.12},
      abstract = {Processing methods affect starch hydrolysis, digestibility, absorption and glycaemic index (GI) of food. Although some studies have reported on the effect of boiling, frying, roasting and baking on glycaemic index of traditional staples, there is limited information on the contribution of drying, fermentation, boiling and steaming on starch bioavailability and glycaemic index. This research work aimed at determining the effect of fermentation, steaming, boiling and drying on starch bioavailability and predicted GI of some cassava-based traditional foods consumed in Ghana. The total starch, amylose, amylopectin, dietary fibre and predicted glycaemic index of the intermediate and finished products were determined according to standard protocols. The analysis established that steaming and boiling increase GI of foods, fermentation has no significant influence on predicted GI of fermented steamed products, and drying has no substantial effect on predicted GI of cassava flour. However, staples or products prepared from solar dried cassava flour would have higher predicted GIs than those of sun dried cassava flour. This work has also provided evidence in support of the fact that total starch and amylopectin give rise to an increase in GI whereas amylose and dietary fibre contents contribute to a decrease in GI of foods. The predicted GIs of raw cassava, boiled cassava (ampesi), akyeke, cooked kokonte with sun dried flour and cooked kokonte with solar dried flour were found to be (47.75%), (77.30%), (79.05%), (40.20%) and (61.11%), respectively. Temperature plays a significant role in breaking hydrogen bonds in food molecules causing the release of glucose and subsequently affecting GI. The GI data of these staples may be used in conjunction with other food composition tables for healthy food choices and nutritional counselling. Processors can incorporate more fibre or amylose-containing crops into food products as well as ensure the use of sun or solar drying to produce low glycaemic index food products.},
     year = {2020}
    }
    

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    T1  - Influence of Processing Methods on Food Components and Glycaemic Index of Cassava-based Traditional Foods
    AU  - Yaw Gyau Akyereko
    AU  - Faustina Dufie Wireko-Manu
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    AB  - Processing methods affect starch hydrolysis, digestibility, absorption and glycaemic index (GI) of food. Although some studies have reported on the effect of boiling, frying, roasting and baking on glycaemic index of traditional staples, there is limited information on the contribution of drying, fermentation, boiling and steaming on starch bioavailability and glycaemic index. This research work aimed at determining the effect of fermentation, steaming, boiling and drying on starch bioavailability and predicted GI of some cassava-based traditional foods consumed in Ghana. The total starch, amylose, amylopectin, dietary fibre and predicted glycaemic index of the intermediate and finished products were determined according to standard protocols. The analysis established that steaming and boiling increase GI of foods, fermentation has no significant influence on predicted GI of fermented steamed products, and drying has no substantial effect on predicted GI of cassava flour. However, staples or products prepared from solar dried cassava flour would have higher predicted GIs than those of sun dried cassava flour. This work has also provided evidence in support of the fact that total starch and amylopectin give rise to an increase in GI whereas amylose and dietary fibre contents contribute to a decrease in GI of foods. The predicted GIs of raw cassava, boiled cassava (ampesi), akyeke, cooked kokonte with sun dried flour and cooked kokonte with solar dried flour were found to be (47.75%), (77.30%), (79.05%), (40.20%) and (61.11%), respectively. Temperature plays a significant role in breaking hydrogen bonds in food molecules causing the release of glucose and subsequently affecting GI. The GI data of these staples may be used in conjunction with other food composition tables for healthy food choices and nutritional counselling. Processors can incorporate more fibre or amylose-containing crops into food products as well as ensure the use of sun or solar drying to produce low glycaemic index food products.
    VL  - 8
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Author Information
  • Department of Food Science and Technology, KNUST, Kumasi, Ghana

  • Department of Food Science and Technology, KNUST, Kumasi, Ghana

  • Department of Food Science and Technology, KNUST, Kumasi, Ghana

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