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Journal of Food Science and Technology

, Volume 56, Issue 4, pp 2244–2256 | Cite as

Improving iron and zinc bioaccessibility through food-to-food fortification of pearl millet with tropical plant foodstuffs (moringa leaf powder, roselle calyces and baobab fruit pulp)

  • Reneè van der Merwe
  • Johanita Kruger
  • Mario G. Ferruzzi
  • Kwaku G. Duodu
  • John R. N. TaylorEmail author
Original Article
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Abstract

Essential mineral (iron and zinc) deficiencies are still prevalent in the Semi-arid Tropics, where many people consume monotonous, predominantly cereal-based diets. This study aimed to evaluate the potential of including tropical plant foodstuffs high in iron and zinc (moringa leaves and roselle calyces) or mineral availability enhancers (baobab fruit pulp) in a pearl millet-based food containing a plant food-based provitamin A source, with the aim of preventing iron and zinc deficiencies in the Semi-arid Tropics. Mineral bioaccessibility was assessed by dialysability assay. Moringa, roselle and baobab considerably increased iron and zinc bioaccessibility when added at 10 parts:100 parts pearl millet (dry basis). These foodstuffs, increased the contribution to the absolute iron requirements of women of reproductive age by 2.5, 2.1 and 2.3 times for moringa, roselle and baobab, respectively and to their absolute zinc requirements by 2.4, 2.1 and 2.7 times, respectively. Combining these plant foodstuffs could contribute up to 28% and 41% of the women’s absolute iron and zinc requirements, respectively, from a single meal. Moringa, despite having the highest iron content, when added at a very high level (30 parts:100 parts pearl millet) decreased bioaccessible iron and zinc, most probably primarily due to its high calcium content. Food-to-food fortification of staple cereal foods with moringa leaves, roselle calyces or baobab fruit pulp plus a provitamin A source can potentially sustainably improve iron and zinc bioavailability in the diets of at-risk communities in the Semi-arid Tropics.

Keywords

Baobab Bioaccessibility Fortification Iron Moringa Roselle Zinc 

Abbreviations

AR

Absolute requirement

db

Dry basis

BFP

Baobab fruit pulp

MLP

Moringa leaf powder

PM

Pearl millet

PVA

Provitamin A

RCP

Roselle calyx powder

Notes

Acknowledgements

This study was made possible by the support of the American People provided to the Feed the Future Innovation Lab for Collaborative Research on Sorghum and Millet through the United States Agency for International Development (USAID) under Cooperative Agreement No. AID-OAA-A-13-00047. The contents are the sole responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government.

Compliance with ethical standards

Conflict of interest

The authors report no conflicts of interest.

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Copyright information

© Association of Food Scientists & Technologists (India) 2019

Authors and Affiliations

  • Reneè van der Merwe
    • 1
  • Johanita Kruger
    • 1
  • Mario G. Ferruzzi
    • 1
    • 2
    • 3
  • Kwaku G. Duodu
    • 1
  • John R. N. Taylor
    • 1
    Email author
  1. 1.Department of Consumer and Food Sciences and Institute of Food Nutrition and Well-beingUniversity of PretoriaPretoriaSouth Africa
  2. 2.Department of Nutrition SciencePurdue UniversityWest LafayetteUSA
  3. 3.Plants for Human Health InstituteNorth Carolina State UniversityKannapolisUSA

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