Black Soldier Fly Larva Meal: A Sustainable and Functional Protein Source for Pet Food

A New Scenario for Proteins in the Pet Food Industry

In this scenario, the pet food industry has been looking for alternatives that simultaneously meet nutritional, technological, and environmental requirements, promoting innovation without compromising the quality of the final products.
 

Among the main trends, the partial or total replacement of traditional protein sources, such as poultry viscera meals, meat and bone meal, fish meal, and soybean meal, with more sustainable ingredients with less environmental impact stands out. In this context, black soldier fly larva meal (Hermetia illucens or BSF) has gained prominence as a promising solution to the current challenges of the production chain.
 

The production of this ingredient is directly related to the ability of the larvae to convert organic waste into biomass of high nutritional value. This process, known as bioconversion, allows the use of agro-industrial by-products, reducing waste and contributing to circular economy models. In this way, BSF flour not only meets nutritional demands but is also part of a broader sustainability strategy in the pet food sector.
 

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From a nutritional point of view, BSF flour has a variable protein content, usually between 35% and 60%, depending on the substrate used in the larvae and the industrial processing applied. Although this content is considered intermediate compared to some conventional sources, the ingredient stands out for the quality of its protein and amino acid profile, suitable for the nutritional requirements of dogs and cats.
 

In addition, BSF flour has a high lipid content, especially lauric acid, a medium-chain fatty acid associated with antimicrobial properties and potential benefits to intestinal health. This differentiated lipid composition can contribute not only to the energy value of diets but also to important functional effects in the animals' bodies.

Recent studies also indicate additional benefits associated with the use of BSF flour in extruded diets, including improvements in skin integrity, coat quality, and antioxidant response. These effects are possibly related to the presence of bioactive compounds and the quality of the nutrients present in the ingredient.
 

Another relevant point is the presence of minerals, such as calcium and phosphorus, at significant levels, as well as essential amino acids, e.g., methionine and tyrosine. The higher concentration of tyrosine, in particular, has been highlighted as a differential of BSF flour, reinforcing its nutritional potential in complete formulations.
 

In addition, BSF flour contains compounds with potential prebiotic and antibacterial action, which can contribute to the modulation of gut microbiota and the maintenance of digestive health. This set of characteristics makes the ingredient attractive not only as a source of protein but also as a functional component in diets for dogs and cats.
 

Because it is an alternative protein and still little used on a large scale, BSF flour also has potential application in hypoallergenic diets, being an interesting option for animals with food sensitivities to conventional proteins, such as chicken, beef or soy.

Digestibility: The Critical Point of Formulation for a Sustainable Future in Pet Food

Digestibility is one of the main criteria for evaluating the quality of new ingredients in animal nutrition. In this aspect, BSF flour presents consistent results, with protein digestibility coefficients similar to those observed in diets formulated with traditional ingredients.
 

Studies indicate that inclusion levels ranging from 5% to 20% result in apparent protein digestibility of 83% to 84%, values compatible with those observed in conventional diets. These results demonstrate that the ingredient is efficiently used by the animals' bodies, without compromising fecal quality.
 

In addition to the protein fraction, the lipid digestibility of BSF flour is also noteworthy, being frequently high due to the presence of medium-chain fatty acids, which are easier to digest and absorb when compared to long-chain fatty acids.
 

The presence of chitin, a structural polysaccharide in the exoskeleton of larvae, represents another important aspect from a nutritional point of view. Chitin can act as a functional fiber, contributing to the modulation of the gut microbiota and the formation of stools with better consistency. However, its effect depends directly on the level of inclusion and processing of the ingredient, and can, at high concentrations, interfere with the digestibility of nutrients.
 

Thus, the use of BSF flour requires an adequate balance in the formulation of diets, in order to maximize its functional benefits without compromising nutritional use.

Palatability and Acceptance by Animals 

Another determining factor for the practical application of the ingredient is palatability. The acceptance of food by animals is one of the main indicators of commercial success, especially in diets for cats, which have more selective feeding behavior.
 

In general, the inclusion of BSF flour does not compromise the intake, and good acceptance is observed in both dogs and cats. However, studies indicate that this factor is strongly dependent on the level of inclusion.
 

Lower levels of substitution, such as 3%, maintain intake similar to the control diet and may even stimulate the animals' initial interest in the food. On the other hand, higher levels, such as 6%, tend to reduce intake and preference. This effect may be associated with the lipid composition of the larvae, especially the higher content of medium-chain fatty acids, which can influence the sensory perception of food.
 

Thus, the definition of the appropriate level of inclusion is essential to ensure the acceptance of the final product, with moderate inclusion being the most suitable strategy for commercial formulations.
 

In addition to the nutritional and functional aspects, BSF flour has significant environmental advantages when compared to traditional protein sources. Its production requires less use of natural resources, such as water and agricultural areas, in addition to resulting in lower greenhouse gas emissions.
 

The ability of larvae to convert organic waste into high-value protein allows the use of by-products that would otherwise be discarded, contributing to the reduction of the environmental impact of the production chain.
 

Another important point is production efficiency. Insect farming has better feed conversion and lower need for inputs when compared to conventional livestock, making it a viable alternative for more sustainable production systems.
 

This set of characteristics positions BSF flour as an ingredient in line with the main global trends in the pet food industry, which seeks to integrate nutritional performance, innovation, and environmental responsibility.
 

In conclusion, black soldier fly larva meal consolidates as a strategic ingredient for the pet food industry, bringing together nutritional quality, functionality, and environmental benefits. Its use allows the development of more sustainable diets without compromising digestibility, fecal quality, or acceptance by animals, representing a promising solution for the future of dog and cat nutrition.

By Bruna Cavalari Santello; Laura Cicília Cassol da Silva; Douglas Melo de Souza; Lorenna Nicole Araújo Santos; Josiane Aparecida Volpato
Source: All Pet Food Magazine
 

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