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<p>Insect-derived proteins have emerged as promising sustainable alternatives to conventional edible proteins, owing to their low greenhouse gas emissions, high feed conversion efficiency, reduced water requirements, and cost-effectiveness. This study investigated the extraction of proteins from the larval biomass of two fly species through alkaline solubilization followed by isoelectric precipitation. The resulting protein isolates were characterized in terms of protein content and extraction yield, infrared spectroscopy, differential scanning calorimetry, amino acid composition, in vitro digestibility, and antioxidant capacity. The highest protein content was obtained from <i>Musca domestica</i> (59.7%), whereas the highest extraction yield was observed for <i>Hermetia illucens</i> (69.9%). Both protein isolates exhibited high thermal stability, with degradation occurring only above 300&#xa0;°C. The amino acid profiles were favorable for incorporation into animal diets, containing essential amino acids such as leucine and lysine. Moreover, the isolates demonstrated high in vitro digestibility, particularly the <i>M. domestica</i> protein (74.7%). The proteins also exhibited antioxidant activity, ranging from 57 to 190&#xa0;µg/g as determined by the FRAP assay, highlighting their potential application in food and feed systems.</p>

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Insect proteins as sustainable foods: Musca domestica and Hermetia illucens

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月20日

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  • Carina Machado Lima,
  • Cristina Jansen,
  • Carem Perleberg,
  • Samuel Machado Abreu,
  • Elessandra da Rosa Zavareze,
  • Daniela Fernandes Ramos,
  • Sandro Daniel Nörnberg,
  • Rafael da Silva Gonçalves,
  • Júnior Mendes Furlan,
  • Graciela Salete Centenaro,
  • Claudio Martin Pereira de Pereira

摘要

Insect-derived proteins have emerged as promising sustainable alternatives to conventional edible proteins, owing to their low greenhouse gas emissions, high feed conversion efficiency, reduced water requirements, and cost-effectiveness. This study investigated the extraction of proteins from the larval biomass of two fly species through alkaline solubilization followed by isoelectric precipitation. The resulting protein isolates were characterized in terms of protein content and extraction yield, infrared spectroscopy, differential scanning calorimetry, amino acid composition, in vitro digestibility, and antioxidant capacity. The highest protein content was obtained from Musca domestica (59.7%), whereas the highest extraction yield was observed for Hermetia illucens (69.9%). Both protein isolates exhibited high thermal stability, with degradation occurring only above 300 °C. The amino acid profiles were favorable for incorporation into animal diets, containing essential amino acids such as leucine and lysine. Moreover, the isolates demonstrated high in vitro digestibility, particularly the M. domestica protein (74.7%). The proteins also exhibited antioxidant activity, ranging from 57 to 190 µg/g as determined by the FRAP assay, highlighting their potential application in food and feed systems.