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Effect of partial substitution of soybean flour with cricket flour on the nutritional composition, in vitro-protein digestibility and functional properties of complementary porridge flour

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Abstract

Low quality complementary foods are the leading cause of undernutrition during infancy and childhood. Development of more nutritious complementary foods and enhancement of their nutrient content through cost-effective food to food fortifications is encouraged. Crickets provide a rich source of nutrients including animal protein and minerals and can potentially substitute soybean in infant formula. This study evaluated the effect of substituting soybean flour with cricket flour on the nutritional composition, in vitro protein digestibility and functional properties of complementary porridge flour. Four treatment flours denoted as CP, CPB1, CPB2 and CPB3 were formulated. Control flour, CP was a composite of maize, wheat and defatted soybean flours in the ratio of 2:1:1 respectively resembling a local infant formula. Flours CPB1, CPB2 and CPB3 were formulated in the same ratio but with substitution of soybean flour with cricket flour at 25%, 50% and 75% respectively. The flours were analyzed for proximate composition, in vitro protein digestibility and functional properties using standard methods. A significant increase was observed in the following nutrients from CP to CPB3; protein, fibre, fats, potassium, sodium, magnesium and zinc. Similarly, in vitro protein digestibility of the flours improved with increased substitution levels. However, a significant decrease was observed in carbohydrate, calcium, phosphorus and iron. A significant decrease was also observed in the viscosity of cold porridge and warm porridge, bulk density, water absorption capacity and protein water solubility of the flours. Protein and carbohydrate were the main nutrient components of the flours. Substitution of soybean flour with cricket flour improved the nutritional and in vitro-protein digestibility of the flours but reduced the viscosity, bulk density, water absorption capacity and protein water solubility of the flours making them suitable for child feeding. Further studies should examine the amino acid profile, antinutrient content and shelf life of the flours.

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Acknowledgements

The authors are grateful to Jaramogi Oginga Odinga University of Science and Technology (JOOUST), through the African Centre of excellence for sustainable use of insects as food and feed (INSEFOODS) for funding this study. We also acknowledge Ms.Milka Akumu (JOOUST) for assisting in cricket processing, Mr. Edward Shakhala and Mr. Nicholas Kibitok (Egerton University) for their support during laboratory analysis.

Funding

The study was funded by Jaramogi Oginga Odinga University of Science and Technology (JOOUST) through the African Centre of Excellence in sustainable use of insects as food and feed (INSEFOODS).

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All the authors contributed to this work. The first and the corresponding author designed the study, conducted the laboratory experiments, interpreted the results and drafted the manuscript. The second and the last authors contributed to the design, interpretation of the results, read and approved the final version of the manuscript.

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Correspondence to Danstone Ochieng Aboge.

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The authors declare that no conflict of interest exists.

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Ethical approval was granted by JOOUST Ethics review committee and National Commission for Science, Technology and Innovation (NACOSTI).

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Aboge, D.O., Orinda, M.A. & Konyole, S.O. Effect of partial substitution of soybean flour with cricket flour on the nutritional composition, in vitro-protein digestibility and functional properties of complementary porridge flour. Int J Trop Insect Sci 42, 1137–1145 (2022). https://doi.org/10.1007/s42690-021-00629-x

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  • DOI: https://doi.org/10.1007/s42690-021-00629-x

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