Anshika Jain
The next generation of alternative protein foods is being shaped not only by the search for new ingredients, but also by the challenge of recreating the physical structure of familiar foods. Consumers expect protein products to have convincing textures, retain moisture during cooking, and deliver a satisfying bite. Plant proteins can provide substantial nutritional value, but reproducing the complex fibrous structure of animal muscle remains difficult. Mycoprotein, a protein-rich food ingredient produced from filamentous fungi, offers a different approach because its natural cellular architecture can provide the foundation for structured foods.
Unlike conventional protein isolates, which are often extracted from soy, peas or other crops and then reconstructed into fibres, mycoprotein consists largely of fungal biomass containing long, branching microscopic filaments called hyphae. These interconnected structures can form a naturally fibrous material that food scientists can process into products resembling pieces of meat. By controlling fungal growth and subsequent processing, manufacturers can influence how the biomass behaves during cutting, chewing, cooking and storage.
Mycoprotein research is therefore moving towards an architecture-led approach to food development. Rather than focusing exclusively on protein concentration, researchers are investigating how fungal strain selection, fermentation conditions, cell-wall composition and processing methods determine the final food’s structure and functionality. This direction could help expand the range of sustainable protein products available to consumers while improving texture, nutritional quality and manufacturing efficiency.
Understanding Mycoprotein and Fungal Biomass
Mycoprotein is derived from edible fungi, particularly filamentous species cultivated under controlled conditions. One established example is Fusarium venenatum, the microorganism used in commercial mycoprotein production. During fermentation, the fungus grows by extending and branching its hyphae, forming a network of biological filaments that collectively create the biomass.
The resulting material contains protein alongside other cellular components, including dietary fibre, carbohydrates, lipids and minerals. Its exact nutritional composition depends on the fungal strain, growth conditions, processing method and final formulation. Unlike purified protein ingredients, mycoprotein can retain much of the structural material of the fungal cells, which contributes to its distinctive physical characteristics.
The concept is important because food texture is influenced by more than protein content. The arrangement of fibres, the distribution of water, the interactions between proteins and other cellular components, and the mechanical strength of the overall network all influence the eating experience. Mycoprotein provides an existing biological structure that can be adapted rather than reconstructed entirely from isolated molecules.
A 2025 review in Annual Review of Food Science and Technology examines the production, nutritional properties and applications of mycoprotein, highlighting its potential as a sustainable protein source and the importance of understanding its underlying biology. This research supports a broader shift towards treating fungal biomass as a functional food material rather than simply a source of protein.
The Architecture of Fungal Hyphae
How Microscopic Filaments Create Texture
Filamentous fungi grow through elongated cellular structures known as hyphae. These microscopic filaments extend, branch and intertwine as the organism develops. At the scale of food production, the collective arrangement of these structures can create a dense, fibrous biomass with properties that differ from those of a typical plant-protein powder.
The geometry of the hyphae matters. Their length, thickness, branching frequency and degree of entanglement can influence how the biomass deforms when pressure is applied. A network containing long, interconnected filaments may respond differently to chewing or cutting from one made up of shorter or more fragmented structures.
This is one reason mycoprotein can offer an advantage in certain meat-alternative applications. Instead of creating every fibre through mechanical processing, manufacturers can use the fungus’s natural growth pattern as the starting point for the food’s structure. Processing can then adjust the density, orientation and cohesion of the biomass to achieve the desired eating characteristics.
However, fungal hyphae do not automatically reproduce the structure of animal muscle. Muscle contains organised fibres, connective tissue, fat and water arranged in a complex biological system. Mycoprotein has its own architecture, and achieving a convincing food texture depends on understanding its particular strengths and limitations.
Cell Walls and the Formation of a Connected Network
The fungal cell wall is another important part of mycoprotein architecture. It provides structural support to individual hyphae and contains materials such as chitin and glucans, although their relative proportions vary between fungal species and growth conditions. These components contribute to the mechanical behaviour of the biomass and influence how water and digestive enzymes interact with the material.
The cell wall also affects how the biomass responds to processing. Excessive mechanical disruption may damage the natural filament network, while insufficient processing may leave the product too firm or uneven. Food developers must therefore balance the preservation of useful cellular structure with the need to create a pleasant, consistent eating experience.
This balance connects microbiology with food engineering. A fungal strain that produces large quantities of biomass is not necessarily the best choice for every product. The most suitable strain may instead be one that generates hyphae with the dimensions, flexibility and structural properties needed for a particular application.
Engineering Fungal Growth Through Fermentation
Controlling the Production Environment
Mycoprotein production commonly uses fermentation systems in which fungal growth takes place under carefully controlled conditions. In submerged fermentation, microorganisms grow in a liquid nutrient medium within a vessel or bioreactor. The process can provide substantial control over temperature, acidity, nutrient availability and oxygen supply, making it suitable for industrial biomass production.
These conditions influence more than the quantity of fungal material produced. They can also affect the morphology of the fungus, including the length and branching of its hyphae. Changes in nutrient balance, aeration, agitation and growth rate may alter the physical properties of the resulting biomass.
The objective of architecture-focused fermentation is therefore to optimise both productivity and functionality. A manufacturer developing a product that requires a tender, fibrous texture may have different requirements from one producing an ingredient intended for a finely minced filling. The production process must generate biomass suited to the final application rather than simply maximise growth.
Researchers are increasingly interested in connecting fermentation measurements with downstream food properties. This approach could help manufacturers predict how a change in production conditions affects texture, moisture retention and processing performance, reducing the need to correct every problem after fermentation is complete.
Selecting the Right Fungal Strain
Fungal strain selection is central to this process because different organisms can produce biomass with different growth characteristics, nutritional profiles and physical structures. Some strains may grow rapidly but generate a texture unsuitable for a particular food. Others may produce desirable filament dimensions or cell-wall properties but require more demanding cultivation conditions.
Developing new mycoprotein sources therefore involves evaluating several characteristics together. These include growth rate, protein accumulation, amino acid composition, digestibility, sensory properties and the stability of the strain under industrial conditions. Food safety is equally important because the selected organism must be appropriate for its intended use and controlled production process.
Advances in molecular biology may eventually allow researchers to understand more precisely which biological characteristics contribute to useful texture. Selective strain development and, where permitted and appropriate, genetic engineering could help create fungi with more predictable production and structural properties.
The challenge is to ensure that improvements in one area do not undermine another. A strain that creates stronger filaments might be harder to process or digest, while a strain that produces softer biomass might deliver lower yields. Successful development requires a coordinated evaluation of the organism, the fermentation process and the final food.
Transforming Fungal Biomass Into Structured Foods
Mechanical Processing and Fibre Alignment
After fermentation, the biomass may undergo processing to achieve the texture and form required for a food product. Depending on the application, this can involve separating excess liquid, heating, cooling, mixing, forming or applying mechanical forces. The aim is to preserve or modify the fungal network so that the final material has suitable strength, moisture retention and bite.
Mechanical processing can change how the hyphae interact with one another. Pressure and shear may redistribute the filaments, alter their orientation or break down portions of the network. The outcome depends on the original biomass structure and the intensity of the processing conditions.
In some applications, the naturally fibrous material can be formed into pieces that provide a meat-like texture without requiring the same degree of fibre reconstruction used in certain plant-based products. In others, mycoprotein may be blended with plant proteins, fats, starches, binders or flavour ingredients to achieve specific product characteristics.
These combinations allow manufacturers to use mycoprotein as a structural component rather than as a complete replacement for every ingredient. A formulation may rely on fungal fibres for bite, plant-derived ingredients for additional functionality and carefully selected fats for flavour and juiciness.
High-Moisture Processing and Extrusion
Extrusion is widely used in the production of structured alternative proteins. During extrusion, ingredients pass through equipment that applies controlled heat, pressure and mechanical shear. Under suitable conditions, the process can help transform protein-rich mixtures into organised structures with a fibrous or layered texture.
High-moisture extrusion is particularly relevant to meat alternatives because water content and processing conditions influence the formation of aligned structures. Although the technique is often associated with plant proteins, researchers are also exploring how processing technologies can be combined with fungal biomass or used to create composite ingredients.
The objective is not necessarily to make mycoprotein behave exactly like soy or pea protein. Its existing hyphal structure offers different starting properties, so processing must be adapted to the material. Too much mechanical force may destroy useful fungal architecture, while insufficient force may produce a texture that lacks cohesion or consistency.
Research published in Food Bioscience in 2025 identifies high-moisture extrusion and three-dimensional printing among the technologies being explored to align protein structures and develop meat-like textures in mycoprotein-based foods. These approaches illustrate how the design of fungal foods is becoming increasingly connected to advanced manufacturing.
Three-Dimensional Food Printing
Three-dimensional food printing offers another route to structured protein design. Instead of shaping an entire mixture through conventional moulding, a printer deposits a food material in successive layers according to a digital design. The resulting structure depends on the ingredient’s flow properties, the printing parameters and the way the deposited material holds its shape.
For mycoprotein, this approach could potentially create products with controlled internal geometry, varied density or customised shapes. A food designer might aim to create a more open structure that retains moisture or a denser arrangement intended to produce a firmer bite. Different formulations could also be placed in separate regions of a printed product.
However, printing mycoprotein is not as simple as loading any fungal biomass into a printer. The material must flow through the nozzle without losing its useful properties, maintain its shape after deposition and withstand subsequent cooking or processing. The natural size and arrangement of the fungal filaments may affect these requirements.
At present, three-dimensional printing is best viewed as a promising research and product-development tool rather than a universal replacement for established manufacturing. Its commercial usefulness will depend on speed, consistency, cost and whether the resulting foods offer a meaningful advantage over conventionally formed products.
Nutritional Design Beyond Protein Content
Mycoprotein architecture also has implications for nutrition because the structure of a food can influence how its components interact with digestion. Protein content alone does not determine nutritional quality. Amino acid composition, digestibility, the overall food matrix and the presence of other nutrients all contribute to how a product functions as part of a diet.
The fungal cell wall and the surrounding network may influence the accessibility of proteins and other nutrients to digestive enzymes. Processing can alter this structure, potentially changing the rate or extent at which certain components become available during digestion. Researchers must therefore evaluate nutritional properties alongside the physical changes introduced by fermentation and manufacturing.
Mycoprotein can provide protein and dietary fibre, but the exact composition varies by product. Its nutritional profile may also be affected by added fats, sodium, binders and flavouring ingredients. A highly processed product made with mycoprotein is not automatically nutritionally superior to every conventional or plant-based alternative.
Future development could focus on balancing protein quality, fibre content, texture and digestibility within a single formulation. This would require nutritional analysis and, where relevant, human studies rather than relying exclusively on laboratory measurements. The goal should be to create foods that combine useful structure with a well-characterised nutritional profile.
Sustainability and the Economics of Fungal Protein
Mycoprotein is attracting attention partly because fermentation can produce protein-rich biomass in controlled facilities without requiring the same land use as conventional livestock production for the equivalent ingredient. Fungal cultivation may also offer opportunities to use selected agricultural side streams as feedstocks, depending on the organism, substrate and safety requirements.
Nevertheless, the environmental performance of mycoprotein depends on the entire manufacturing system. Electricity use, aeration, nutrient production, water consumption, temperature control, downstream processing and waste management can all affect its footprint. The source of energy and the efficiency of the fermentation process are particularly important when evaluating industrial-scale production.
Economic feasibility presents a related challenge. Large fermentation facilities require substantial investment, specialised equipment and consistent supplies of suitable nutrients. Manufacturers must also ensure reliable biomass quality and manage the costs of forming, packaging and distributing the final product.
Architecture-led production could improve commercial performance if manufacturers learn to produce the desired texture directly during fermentation. This could reduce the need for intensive downstream processing and simplify formulations. However, those savings must be demonstrated under realistic production conditions. A more complex fermentation process may not be worthwhile if it increases costs or reduces productivity.
The strongest sustainability claims will come from comparative life-cycle assessments that examine specific products against relevant alternatives, rather than assuming that all fungal foods have the same environmental benefits.
Safety, Regulation and Consumer Acceptance
Mycoprotein development requires rigorous attention to food safety. The production organism must be suitable for food use, fermentation must be controlled, and the final biomass must meet appropriate standards for identity, composition and quality. Manufacturers must also manage potential contaminants and verify that production remains consistent between batches.
Some consumers may experience allergic reactions or gastrointestinal discomfort after consuming particular mycoprotein products. Fungal ingredients should not therefore be described as universally suitable for everyone. Appropriate ingredient information, safety evaluation and compliance with local food regulations are essential.
Regulatory requirements vary between jurisdictions and may depend on the species, production process, intended use and history of consumption. New fungal strains or novel production methods may require additional assessment before commercial use. Developers also need to communicate accurately about the ingredients and manufacturing processes used in their products.
Consumer acceptance depends on more than safety. Texture, flavour, price, cooking performance and familiarity influence whether people choose a food repeatedly. Mycoprotein architecture may help improve the eating experience, but successful products must also fit everyday meals and cultural food preferences.
The Future of Mycoprotein Architecture
The next phase of research is likely to focus on integrating fungal biology, fermentation engineering and food-structure design into a more unified development process. Rather than optimising biomass production first and addressing texture afterwards, researchers can increasingly treat both as connected design objectives.
Digital monitoring and machine learning may help identify relationships between fermentation conditions, hyphal morphology and final product characteristics. Advanced microscopy and material testing could provide a clearer understanding of how the fungal network responds to processing. These insights may allow developers to predict the texture of a final food more accurately before investing in large-scale manufacturing.
Another promising direction is the development of specialised mycoprotein ingredients for different applications. A product intended for shredded fillings may require a different filament structure from one designed for burgers, dumpling fillings or ready-to-eat protein snacks. Tailoring the biomass to the intended use could improve consistency and reduce reliance on extensive reformulation.
The most effective approach will likely combine several technologies rather than depend on one breakthrough. Better fungal strains, controlled fermentation, suitable processing and thoughtful formulation must work together. Regulatory compliance, consumer feedback and environmental assessment will remain equally important in determining which innovations reach the market.
Conclusion
Mycoprotein architecture is changing how researchers approach fungal biomass as a source of structured protein foods. Its network of microscopic hyphae provides a natural fibrous framework that can be shaped, processed and combined with other ingredients to develop products with distinctive textures. By understanding how fungal growth, cell-wall composition and mechanical processing interact, food scientists can design mycoprotein for specific culinary and nutritional applications.
The emerging opportunity lies in coordinating biology and food engineering from the beginning of production. Advances in strain selection, fermentation control, extrusion, digital monitoring and three-dimensional food printing may expand the range of structures that fungal ingredients can achieve.
However, improved texture alone will not guarantee success. Nutritional quality, safety, affordability, environmental performance and consumer acceptance must all be considered. If these factors are addressed together, mycoprotein could become an increasingly versatile component of future protein foods, offering a practical example of how microscopic biological structures can help shape the next generation of food manufacturing.