effect of different home-cooking methods on the bioaccessibility of zinc and iron in conventionally bred cowpea (vigna unguiculata l. walp) consumed in brazil

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ID: 190323
2016
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Abstract
Background: The cowpea (Vigna unguiculata L. Wap.) is an excellent source of iron and zinc. However, iron from plant sources is poorly absorbed compared with iron from animal sources. Objectives: The objective of this study was to evaluate iron and zinc bioaccessibility in cowpea cultivars after processing. Methods: Zinc and iron bioaccessibilities in cowpea samples were determined based on an in vitro method involving simulated gastrointestinal digestion with suitable modifications. Results: When water-soaked beans were cooked in a regular pan, the highest percentage of bioaccessible iron obtained was 8.92%, whereas when they were cooked in a pressure cooker without previous soaking, the highest percentage was 44.33%. Also, the percentage of bioaccessible zinc was 52.78% when they were cooked in a regular pan without prior soaking. Higher percentages of bioaccessible iron were found when cooking was done in a pressure cooker compared with regular pan cooking. In all cultivars, cooking of cowpea beans in both pressure cooker and in a regular pan yielded higher percentages of bioaccessible zinc compared with availability of bioaccessible iron. Conclusions: Iron bioaccessibility values suggest that cooking in a regular pan did not have a good effect on iron availability, since the percentage of bioaccessible iron was lower than that of zinc. The determination of iron and zinc bioaccessibility makes it possible to find out the actual percentage of absorption of such minerals and allows the development of efficient strategies for low-income groups to access foods with high levels of these micronutrients.
Reference Key
pereira2016foodeffect Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Elenilda J. Pereira;Lucia M. J. Carvalho;Gisela M. Dellamora-Ortiz;Flávio S. N. Cardoso;José L. V. Carvalho
Journal scandinavian journal of pain
Year 2016
DOI
10.3402/fnr.v60.29082
URL
http://www.foodandnutritionresearch.net/index.php/fnr/article/view/29082
Keywords
Zinc bioaccessibility iron foods and food supply

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