GFI Meta-Analysis: Fermentation Protein Costs Are Closing In on Beef and Pork
- Gauri Khanna
- 5 hours ago
- 5 min read
The Good Food Institute's June 2025 meta-analysis of 55 published techno-economic models finds that biomass fermentation proteins, including mycoprotein, are approaching cost parity with beef and pork, while precision fermentation proteins and microbial oils face a steeper climb.
Published models overestimate production costs because they assume smaller scales and lower fermentation concentrations than commercial reality; a private-sector case study from Hawkwood Biotech projects a cost of $2.50 per kg at 32,000 metric tonnes annually, roughly half the published median.
Feedstock costs, capital expenditure, and fermentation process efficiency are the three dominant levers standing between today's economics and the price points needed to displace conventional proteins at scale.
A Landscape Built on Incomplete Maps
The alternative protein sector has no shortage of ambition. As of 2024, The Good Food Institute counts 165 companies focused on fermentation-derived proteins, with over 200 more operating related business lines. What it does have a shortage of is reliable, publicly available cost data.
GFI's June 2025 report, produced with analytical support from Hawkwood Biotech, represents the most comprehensive attempt to date to aggregate and normalise published techno-economic models (TEMs) for fermentation-derived food ingredients. TEMs estimate the full cost of producing a given ingredient, from raw materials and energy through to finished product. The team reviewed 190 publications and identified 55 models meeting quality and relevance thresholds, covering three product categories: biomass proteins (which include mycoprotein and single-cell protein from yeast, fungi, algae, and bacteria), precision fermentation proteins (specific recombinant proteins such as whey, casein, and egg proteins), and microbial oils.
The picture that emerges is uneven. Biomass fermentation has a reasonably developed body of published modelling. Precision fermentation and microbial oils, by contrast, are poorly served, and where models do exist, they often bear little resemblance to what industry is actually doing.
Where Biomass Proteins Stand
Across 25 published biomass fermentation TEMs, estimated costs cluster around $4 to $6 per kg of biomass, with a median of approximately $4.30 per kg. The range spans $1.27 to $18.10 per kg, with the extremes driven by production scale and feedstock type.
Fungal biomass, which includes mycoprotein produced by filamentous fungi comparable to those used by Quorn, falls within $3.90 to $6.00 per kg of biomass in published models, placing it within a comparable range of wholesale beef and pork prices. On a per-protein basis, however, the gap with chicken and plant proteins remains meaningful. Published fungal biomass models carry a median cost of $21.10 per kg of protein, against a median of around $13.50 per kg for structured poultry and $6.00 per kg for plant protein concentrates such as soy and pea.
The private-sector comparison is instructive. Hawkwood Biotech provided proprietary FEL-1 models based on commercial-scale aerobic fed-batch fermentation of yeast and microalgae using corn glucose as feedstock. These models, assuming annual production of 32,000 metric tonnes, project a cost of $2.50 per kg and $4.20 per kg of protein — competitive with a wide range of conventional protein ingredients. Published models covering similar organisms assume average production volumes of around 10,000 metric tonnes annually and produce median cost estimates of $7.00 per kg, a 180% premium over the private benchmark. The divergence stems primarily from scale: published models consistently underestimate production volumes relative to commercial practice, and many also underestimate fermentation titer — the concentration of product in the fermentation vessel — which is a critical driver of per-unit economics.
Gas fermentation, which uses carbon-based gases as feedstock rather than sugars, shows a wide cost range in published models ($1.30 to $11.00 per kg) but demonstrates competitive median costs at high production volumes. Commercial facilities such as Calysta and Adisseo already operate at around 20,000 metric tonnes annually. The trade-off is capital intensity: gas fermentation requires specialised bioreactors and gas-handling infrastructure, making it more expensive to build even when feedstock costs are lower.
The Precision Fermentation Data Gap
For precision fermentation proteins, the published literature is, in the authors' assessment, inadequate. Only four TEMs focused on food proteins were identified, covering collagen peptide, thaumatin, lactoferrin, and an unspecified nutritional recombinant protein. Estimated costs range from under $20 per kg to approximately $15,000 per kg, with a notable absence of models in the $20 to $200 per kg range — precisely where many industry professionals believe the current state of technology sits, based on private benchmarks provided by Hawkwood.
Published models assume production volumes between 50 and 2,500 metric tonnes annually. Private sector benchmarks range from 2,500 to over 25,000 metric tonnes annually. Average titer in published models is approximately 24 grams per litre; private benchmarks average around 42 grams per litre. These gaps make it effectively impossible to assess how close precision fermentation proteins are to competing with commodity dairy or egg proteins — a question that matters considerably, given ongoing egg supply disruptions from avian influenza and growing demand for animal-free dairy ingredients.
Microbial oils occupy a similarly limited landscape: seven published models, covering generic microbial oil and omega-3 polyunsaturated fatty acids (PUFAs). Commodity vegetable oils remain out of reach at current modelled costs. However, high-value omega-3 oils represent a more viable near-term target, with U.S. microbial oil export prices averaging $19.90 per kg in 2024, broadly consistent with published production cost estimates of $18 to $20 per kg — though these models reflect sub-commercial scales and costs are expected to fall with volume.
The Levers That Matter Most
Across all 54 models with sufficient cost driver detail, three categories dominate. Feedstock and raw material costs represent the primary driver in over half of published models. Facility and capital costs rank second. Fermentation process metrics — yield, titer, and productivity — rank third, though these are better understood as levers that simultaneously influence the other two.
The Hawkwood sensitivity analysis on a hypothetical 32,000 metric tonne single-cell protein facility makes the interdependencies concrete. A 30% increase in titer reduced cost of production by 12%; a 30% decrease raised it by 22%, reflecting asymmetric compounding effects on fixed-cost recovery and downstream processing efficiency. Feedstock price was the largest external cost driver: a 40% rise in corn glucose prices increased production cost by 14.3%. Downstream processing recovery — how much product is retained after purification — also emerged as a significant lever, with a 10% reduction in recovery efficiency pushing costs up by 11%.
Capital costs showed more moderate sensitivity. A 25% increase in total equipment costs raised production cost by roughly 6%, partly because fixed costs are diluted across high production volumes at commercial scale.
Limitations and What Comes Next
The report's own acknowledged limitation is substantial: most of its conclusions about industry competitiveness rest on private data from a single modelling firm, Hawkwood Biotech, which limits independent verification. Published TEMs, meanwhile, systematically underrepresent commercial practice, creating a structural gap that neither academic nor industry sources have yet resolved.
GFI recommends that producers share anonymised, aggregated process parameters with researchers; that policymakers fund public-private fermentation manufacturing hubs to reduce capital barriers; and that the modelling community establish standardised reporting frameworks analogous to ISO standards for life cycle assessment. Navigating the regulatory and commercial pathway for fermentation-derived ingredientsremains a parallel challenge the sector must address alongside cost reduction.