Insect-Based Protein Production and Nutritional Applications
Summary
Insect-based protein production harnesses the natural ability of various insect species to convert organic substrates into high-value biomass rich in protein and lipids. Chief among these species is the black soldier fly (Hermetia illucens), whose larvae can be reared on agricultural residues, food waste or tailored feed formulations to yield a sustainable protein source for animal feed and, potentially, human consumption. Nutritional analyses reveal insect meals to contain essential amino acids, polyunsaturated fatty acids and micronutrients comparable to conventional sources such as fishmeal or soybean meal. Life-cycle assessments indicate markedly lower greenhouse gas emissions, land use and water footprints for insect rearing versus traditional livestock. Advances in industrial rearing have led to continuous-flow systems that optimise temperature, humidity and substrate composition for maximal bioconversion efficiency. Downstream processing—such as defatting, drying and grinding—produces stable powders suitable for formulation into feeds, protein concentrates or novel food ingredients. Beyond nutritional advantages, insects can valorise waste streams, close nutrient loops and reduce environmental impacts. The global significance of this technology is underscored by its potential to alleviate protein shortages, diversify protein portfolios and support circular-economy principles in agriculture and aquaculture.
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Insect-Based Protein Production and Nutritional Applications publication trend
The graph below shows the total number of articles in insect-based protein production and nutritional applications across all publications each year (not limited to Nature Index journals).
Technical terms
Feed conversion efficiency: Ratio of insect biomass gained to the mass of substrate consumed.
Apparent metabolizable energy: Energy in feed available for metabolism after losses in faeces and excreta.
Defatted insect meal: Insect powder from which lipids have been partially or wholly removed to concentrate protein.
Entomophagy: The practice of consuming insects as food.
Black soldier fly larvae: Immature stage of Hermetia illucens used for organic waste bioconversion and protein production.
References
- Feed Conversion, Survival and Development, and Composition of Four Insect Species on Diets Composed of Food By-Products. PLOS ONE (2015).
- Nutritional value of a partially defatted and a highly defatted black soldier fly larvae (Hermetia illucens L.) meal for broiler chickens: apparent nutrient digestibility, apparent metabolizable energy and apparent ileal amino acid digestibility. Journal of Animal Science and Biotechnology (2017).
- Review of Black Soldier Fly (Hermetia illucens) as Animal Feed and Human Food. Foods (2017).
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