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KMID : 0613820190290121378
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Journal of Life Science
2019 Volume.29 No. 12 p.1378 ~ p.1385
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Comparative Analysis of Nutrients and Hazardous Substances in Zophobas atratus Larvae
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Kim Sun-Young
Kim Hong-Geun
Ko Hyeon-Jin
Kim Mi-Ae
Kim In-Woo
Seo Min-Chul
Lee Joon-Ha
Lee Hwa-Jeong
Baek Min-Hee
Hwang Jae-Sam
Yoon Hyung-Joo
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Abstract
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The nutritional composition and optimal eating stage of the super mealworm, Zophobas atratus (Coleoptera: Tenebrionidae), were investigated to explore its use as a food ingredient. It was determined that 10th instar larvae were most suitable for eating in terms of nutritional value as well as economic aspects. To improve the quality of powder production, the nutritional value of 10th instar larvae before and after degreasing was analyzed. After drying the larvae powder, crude protein was the most abundant nutrient both before (52.3%) and after (60.6%) degreasing while crude fat measured 36.3% and 21.7% before and after degreasing, respectively. In terms of essential amino acids, leucine levels were highest and 1.3 times greater after degreasing (4.5%) than before (3.5%). Oleic acid, the highest unsaturated fatty acid in larvae, was 31.7% after degreasing which was 1.1 times higher than before (33.2%). Among various major minerals, potassium was most abundant and 1.4 times higher after degreasing (1267.0 mg/100 g) than before (879.3 mg/100 g). Harmful substances were 1.3 to 2.0 times lower in the degreased larvae, although mercury or pathogenic bacteria were not detected in either group. We therefore conclude that degreased Z. atratus larvae are more suitable for eating than before degreasing.
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KEYWORD
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Degreasing, hazardous substances, larvae, nutrients, Zophobas atratus
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