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Nutrients, functional properties, storage stability and costing of complementary foods enriched with either termites and fish or commercial micronutrients

In: Journal of Insects as Food and Feed
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J.N. Kinyuru Department of Food Science and Technology, Jomo Kenyatta University of Agriculture and Technology, P.O. Box 62000-00200, Nairobi, Kenya

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S.O. Konyole

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S.A. Onyango-Omolo Institute of Tropical & Infectious Diseases, University of Nairobi, P.O. Box 19676-00200, Nairobi, Kenya

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G.M. Kenji Department of Food Science and Technology, Jomo Kenyatta University of Agriculture and Technology, P.O. Box 62000-00200, Nairobi, Kenya

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C.A. Onyango Department of Food Science and Technology, Jomo Kenyatta University of Agriculture and Technology, P.O. Box 62000-00200, Nairobi, Kenya

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V.O. Owino Technical University of Kenya, P.O. Box 52428-00200, Nairobi, Kenya

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B.O. Owuor Department of Biology, Catholic University of Eastern Africa, P.O. Box 62157-00200, Nairobi, Kenya

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B.B. Estambale Institute of Tropical & Infectious Diseases, University of Nairobi, P.O. Box 19676-00200, Nairobi, Kenya

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N. Roos Faculty of Life Sciences, University of Copenhagen, Bülowsvej 17-1870 Frederiksberg, Copenhagen, Denmark

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Application of edible insects in complementary food production has not been studied much. This study developed and evaluated complementary foods based on edible termites to combat child malnutrition in Kenya. Two complementary foods, Winfood Classic (W-C; containing termites anddagaa fish) and Winfood Lite (W-L; without termites anddagaa fish) were formulated and processed by extrusion cooking. Their nutrient content, functional properties, storage stability and cost of the foods were evaluated using standard methods. W-C contained significantly higher (P<0.001) levels of 423.6 kcal/100 g energy, 19.1 g/100 g protein, 12.3 g/100 g fat, 6.3 mg/100 g zinc than W-L which contained 407.2 kcal/100 g energy, 14.6 g/100 g protein, 9.0 g/100 g fat and 5.5 mg/100 g zinc. Iron content in W-C (12.2 mg/100 g) and W-L (12.5 mg/100 g) were not significantly different (P=0.37). The energy contribution from fats (26.1 E%) from W-C was within the recommend levels in complementary foods while energy from proteins (protein E%) was higher from the two foods (18.0 and 14.3 E%, respectively). Bulk density was significantly different (P=0.02) amongst W-C and W-L and within the recommended levels of ≤0.5 g/cm3 in complementary foods. The foods were shelf stable for 6 months of storage with neither pathogenic microorganisms nor aflatoxins reported. Peroxide value was below the limits (≤10 meq/kg) after 6 months of storage. Production cost of the foods was 3.21 and 2.23 US$/kg for W-C and W-L, respectively, with termites contributing 42.3% of the basic cost of production in W-C. The study confirms that termites anddagaa fish can be utilised in processing of affordable and safe complementary foods with adequate nutrient density.

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