The big picture: For thousands of years, producing milk, eggs and meat proteins required raising animals.
Precision fermentation changes that equation.
By programming microorganisms to produce specific proteins and other ingredients, innovators can make whey, casein, egg albumin and other functional food components without raising, feeding or slaughtering the animal that traditionally produced them.
Why it matters: This is more than another alternative-food category.
It could shift part of food production from a resource-intensive livestock system toward a more distributed form of biomanufacturing—one that uses dramatically less land and potentially produces food closer to where it is needed.
But precision fermentation will not automatically create a fair, affordable or sustainable food system.
The outcome will depend on energy, ownership, regulation, infrastructure and whether farmers and communities participate in the transition—or are displaced by it.
The core signal
The global food system must produce more nutrition while placing less pressure on land, water, climate and public health.
Livestock systems provide food, income and livelihoods to communities worldwide. But they also have major effects on air, soil, water, land and biodiversity. The UN Food and Agriculture Organization estimates that livestock agrifood systems generated about 6.2 billion tonnes of carbon dioxide equivalent in 2015—roughly 12% of human-caused greenhouse-gas emissions.
Meanwhile, precision fermentation has moved from producing enzymes, vitamins and flavoring ingredients to creating proteins that perform many of the same functions as animal-derived dairy and eggs.
The sector now includes more than 160 specialized companies, although investment fell sharply in 2025 and several businesses closed or restructured as the industry confronted the realities of commercial scale.
The shift: Food innovators are no longer asking only how to imitate animal products with plants.
They are asking whether the essential ingredients can be produced without the animal.
What is precision fermentation?
Precision fermentation uses microorganisms—often yeast, fungi or bacteria—as highly specialized production systems.
A company identifies the genetic instructions for a desired protein, introduces those instructions into a microorganism and places the organism inside a controlled fermentation tank. The microbes consume a nutrient-rich feedstock and produce the target ingredient. The ingredient is then separated, purified and formulated into food.
It is similar in principle to brewing beer or producing enzymes through fermentation—but the microorganism is directed to produce a particular molecule, such as whey protein, casein or ovalbumin.
Important distinction: Precision fermentation is not cultivated meat.
Cultivated meat grows animal cells. Precision fermentation normally uses microbial cells to make individual proteins, fats, enzymes or other ingredients.
The microbes are the production workers.
The final ingredient is the product.
The problem with the current system
1. Animals require enormous amounts of land
Livestock production requires pasture as well as cropland for feed.
A major global analysis found that meat, aquaculture, eggs and dairy use approximately 83% of agricultural land while providing about 18% of calories and 37% of protein. The exact impacts vary greatly by farm, region and production method, but animal agriculture remains the dominant user of agricultural land.
Why it matters: Land used for grazing or feed cannot simultaneously be used for forests, restored ecosystems, diversified crops or other community needs.
Reducing the land required for some proteins could create opportunities for ecosystem restoration, regenerative crop production and greater regional food resilience.
2. Livestock creates climate pressures at several points
Ruminants release methane during digestion. Manure produces methane and nitrous oxide. Feed production requires land, fertilizer, machinery and transportation. In some regions, expanding pasture and feed crops also contributes to deforestation.
Livestock is not the only source of food-system emissions, and production practices differ. But the combined system represents a substantial climate burden that efficiency improvements alone may not eliminate.
Precision fermentation avoids enteric methane because there is no cow or other ruminant inside the production system.
Its climate footprint instead depends heavily on the electricity, heat, feedstocks and purification processes used by the fermentation facility.
3. Intensive production can increase pollution
Large livestock operations concentrate manure and nutrients in limited areas.
Poorly managed waste can contribute to air pollution, contaminated waterways, excess nitrogen and phosphorus, and degraded soil and aquatic ecosystems. Feed production can add fertilizer, pesticide and irrigation pressures elsewhere in the supply chain. FAO identifies impacts across water, soil, biodiversity, land and air.
A fermentation facility also generates waste streams and requires water and cleaning chemicals.
The difference is that these flows may be easier to contain, monitor and recirculate inside a controlled industrial facility—provided strong environmental standards are enforced.
4. Routine antibiotic use creates a public-health risk
Antibiotics are essential for treating sick animals. The danger emerges when they are overused for growth promotion or routine disease prevention in intensive production.
The World Health Organization has warned that high antibiotic use in food-producing animals contributes to antimicrobial-resistant bacteria and has recommended ending routine antibiotic use in healthy animals.
Precision fermentation does not eliminate every food-safety risk. Fermentation facilities still require rigorous contamination controls.
But replacing some livestock-derived ingredients could reduce one pathway through which large animal populations drive antibiotic demand.
5. Industrial systems raise animal-welfare concerns
High-volume production frequently treats animals as units of output rather than living beings.
Concerns include confinement, overcrowding, painful procedures, long-distance transportation and slaughter conditions. Standards differ considerably, and many farmers work to improve animal care.
Precision fermentation offers a structural alternative: produce the functional ingredient without breeding an animal specifically to become part of an industrial supply chain.
6. Animal supply chains are vulnerable to disruption
Disease outbreaks, feed-price increases, drought, extreme weather and transportation problems can rapidly affect the availability and cost of animal-derived ingredients.
Egg and dairy proteins are especially important to commercial baking, nutrition products and packaged foods because they bind, foam, emulsify, stretch and add texture. Companies are therefore exploring precision fermentation not only for sustainability, but for more predictable production and regional supply. Onego Bio, for example, is developing fermented ovalbumin for food manufacturing, while current demand has also placed upward pressure on traditional whey markets.
What can precision fermentation replace?
Dairy proteins
Milk is not one ingredient. It is a complex mixture of water, proteins, fats, sugars, minerals and other compounds.
Precision fermentation companies are initially targeting the proteins that give dairy products their distinctive performance.
Perfect Day and Remilk produce whey proteins without cows. Formo, New Culture and other companies are working on casein—the protein responsible for much of cheese’s stretch, melt and structure. These ingredients can be combined with plant-derived fats, carbohydrates, minerals and water to create milk, cheese, yogurt, ice cream and nutrition products. (Perfect Day)
The opportunity: Replace the cow as the protein-production system while preserving the functions that consumers and food manufacturers expect.
Egg proteins
Egg whites perform several difficult jobs in food production. They bind ingredients, create foams, retain moisture and help baked products develop structure.
Onego Bio uses fungi to produce ovalbumin, the main protein in egg white. The company received an FDA “no questions” letter concerning its GRAS conclusion in September 2025 and plans a Wisconsin facility intended to serve large-scale food manufacturing. (Onego Bio – animal-free egg white)
The EVERY Company is also developing fermentation-derived egg proteins for use in food and beverage products.
The near-term market: Precision-fermented egg protein may reach industrial bakeries and food manufacturers before it replaces the carton of whole eggs in a household refrigerator.
Specialized ingredients
Precision fermentation can also produce enzymes, flavor compounds, nutritional proteins and ingredients traditionally obtained in small quantities from animals.
This is where the economics may work first.
A high-value ingredient used in small amounts is easier to commercialize than a low-cost commodity consumed by the kilogram. Companies can improve their processes and manufacturing volumes through specialized markets before competing directly with inexpensive conventional milk or eggs.
What precision fermentation cannot replace by itself
Precision fermentation does not grow fruits, vegetables, grains or legumes.
It does not restore soil.
It does not replace the cultural knowledge of farming communities or the role that well-managed animals can play in some mixed farming and pastoral systems.
It also does not produce a complete steak, chicken breast or whole egg simply by making one protein.
The practical future is hybrid: Plant agriculture can provide carbohydrates, oils, fiber, minerals and bulk protein. Precision fermentation can provide specific functional components. Cultivated cells may eventually provide animal tissues. Regenerative and agroecological farms can continue producing whole foods while restoring ecosystems.
The transition is therefore not from farming to factories.
It is from one dominant model toward a more diverse food-production system.
The environmental promise—and the fine print
Life-cycle assessments generally suggest that precision-fermented dairy and egg proteins could use far less land and produce fewer emissions than conventional animal-derived equivalents.
Some company-commissioned assessments report very large reductions. But the scientific evidence remains limited, methodologies differ, and the final footprint depends on what feeds the microbes and powers the facility. Renewable electricity can strengthen the climate advantage; fossil-heavy energy, inefficient purification and resource-intensive sugar feedstocks can reduce it.
The lesson: Precision fermentation is not inherently sustainable.
It must be made sustainable.
A plant powered by fossil fuels, dependent on industrial monocultures and controlled by a small number of patent holders could reproduce many of the food system’s existing problems in a new form.
The hurdles innovators must overcome
1. The cost of scale
A protein that works in a laboratory is not yet a commercial food system.
Companies must increase three interdependent measures:
Titer: How much product is produced in a given volume.
Rate: How quickly it is produced.
Yield: How efficiently feedstock becomes the desired product.
Small inefficiencies become expensive when a company moves from a laboratory vessel to tanks holding thousands—or eventually hundreds of thousands—of liters.
According to the Good Food Institute,the industry is experimenting with continuous fermentation and machine-learning process controls. A 2025 demonstration at 3,000-liter scale reported substantial productivity improvements, but broader modeling and commercial validation are still needed.
2. A shortage of appropriate infrastructure
Pharmaceutical fermentation plants are built for high-value products manufactured in relatively small volumes.
Food proteins require much greater volumes at much lower prices.
That means the industry needs food-grade bioreactors, separation equipment, trained operators, laboratories, utilities and regional manufacturing facilities. Building this infrastructure can require hundreds of millions of dollars before a company has demonstrated stable mass-market demand.
Shared and publicly supported pilot facilities could help smaller companies cross the gap between a successful experiment and commercial manufacturing.
3. Expensive downstream processing
Fermentation receives most of the attention. Purification can determine whether the business succeeds.
After fermentation, companies must separate the desired ingredient from the organisms, water, remaining feedstock and other fermentation outputs. Filtration, drying and purification can consume energy and add considerable cost.
For food, the process must be safe and consistent—but not so elaborate that it gives a commodity protein pharmaceutical-level production costs.
4. Feedstock and energy dependence
Microorganisms must eat.
Most current systems rely on refined sugars or other agricultural feedstocks, meaning precision fermentation does not yet disconnect food production from agriculture. It changes what agriculture supplies—from feed for animals to inputs for microorganisms.
The strongest systems could eventually use agricultural residues, food-processing side streams or other low-impact feedstocks. But those sources must be safe, consistent and economically recoverable.
Facilities also need reliable electricity, heat and cooling.
The system test: Does the technology reduce resource use across its complete supply chain—or merely move the burden somewhere less visible?
5. Regulation moves at different speeds
Food-safety regulators must evaluate the production organism, genetic construction, manufacturing process, purity, potential contaminants, nutritional profile and intended use.
The United States has allowed several ingredients to move through its GRAS notification system. Canada, Singapore and Israel have also cleared certain fermentation-derived proteins. European novel-food authorization has generally been slower and can take years, creating uncertainty for companies deciding where to invest.
Regulatory scrutiny is necessary.
The challenge is creating processes that are rigorous, transparent and predictable rather than inconsistent or indefinitely delayed.
6. Consumers need clarity—not clever terminology
“Animal-free” does not mean allergen-free.
A precision-fermented whey protein may still trigger a milk allergy because it is a milk protein. Fermented ovalbumin remains an egg allergen. FDA documentation requires milk-allergen labeling for fermentation-derived beta-lactoglobulin, and Onego Bio acknowledges that its product contains egg allergens.
This creates a communications challenge.
Products may be produced without animals and contain no lactose, yet remain unsuitable for people with milk-protein allergies. Labels must clearly explain what the ingredient is, how it was made and who should avoid it.
Trust will not come from hiding the science.
It will come from making the science understandable.
7. Financing has become more difficult
Precision fermentation requires patient capital, but the wider alternative-protein investment boom has cooled.
GFI reports that fermentation-focused companies raised $357 million in 2025, down from $632 million in 2024. Closures and restructurings have made investors more focused on real production costs, customer demand and credible routes to profitability.
This may create a healthier industry over time.
But it also creates a dangerous funding gap between scientific validation and commercial-scale production.
8. Intellectual property can slow shared progress
Companies protect strains, production methods, protein designs and purification processes through patents and trade secrets.
Some protection can reward expensive research. Too much concentration can create toll gates around foundational technology, raise licensing costs and prevent smaller innovators from entering the market.
GFI has identified intellectual-property disputes as a commercialization risk capable of delaying projects and contributing to business disruption.
A resilient industry will need both commercial incentives and shared technical standards.
9. The transition could leave farmers behind
Livestock is not only a production system. It is a livelihood, cultural tradition and financial asset for hundreds of millions of people.
A rapid shift controlled entirely by biotechnology companies could concentrate ownership, eliminate rural income and replace dependence on large meat and dairy corporations with dependence on large fermentation corporations.
A just transition must include farmers.
Opportunities could include growing diverse fermentation feedstocks, operating regional production facilities, supplying agricultural side streams, restoring land, producing higher-value foods and becoming owners in new manufacturing cooperatives.
The goal should not be to remove people from food production.
It should be to remove unnecessary extraction and vulnerability from the system.
What is working now
Precision fermentation is already demonstrating that animal-identical proteins can be produced without animals.
Regulatory clearances are expanding. Companies are improving strain productivity. New facilities are being planned. Food manufacturers are testing fermented proteins in baked goods, beverages, nutrition products, cheese and other applications. (Onego Bio – animal-free egg white)
The most promising strategy is not attempting to replace the entire food system at once.
It is identifying the ingredients where conventional production creates the greatest environmental pressure, supply instability or functional bottleneck—and replacing those first.
The Mobilized framework
Signal: Rising demand for animal-derived protein is colliding with climate, land, water, health and supply-chain pressures.
System: Agriculture connects land, energy, water, public health, biodiversity, labor, trade and community livelihoods.
Risk: Scaling the current livestock model can deepen ecological stress, while an unmanaged technological transition could concentrate food production in a new group of corporations.
Solution: Use precision fermentation selectively to produce high-impact animal proteins with fewer animals and fewer resources.
Capability: Build regional infrastructure, open technical standards, renewable energy, transparent regulation, farmer participation and community ownership into the emerging industry.
What needs to happen next
Fund shared infrastructure
Public pilot plants and regional fermentation centers can help universities, cooperatives and smaller companies test processes without each building an entire facility.
Connect fermentation to renewable energy
The climate benefits improve when clean electricity and efficient heat systems power production.
Develop lower-impact feedstocks
Agricultural residues, diversified crops and food-industry side streams could reduce dependence on refined sugar and monocultures.
Require transparent environmental accounting
Companies should publish independently reviewed life-cycle assessments covering energy, water, feedstock, waste, land and facility construction.
Protect consumers
Clear ingredient names, allergen warnings and accessible explanations should be mandatory.
Give farmers an ownership pathway
Producer cooperatives, regional development funds and public-private partnerships can ensure that rural communities benefit from the new system.
Prevent another concentrated food monopoly
Interoperable processes, shared research, competition policy and public-interest licensing can keep foundational food technologies from becoming permanent private chokepoints.
The bottom line
Precision fermentation cannot replace all agriculture.
It can replace a significant portion of the work currently assigned to animals—especially the production of individual proteins used in dairy, eggs and processed foods.
That could reduce land demand, methane emissions, manure pollution, antibiotic pressure and animal suffering.
But technology alone will not determine whether the transition succeeds.
The real question is not simply:
Can microbes make milk and egg proteins?
They already can.
The question is:
Can we build a food system around this capability that is affordable, renewable, transparent, distributed and accountable to the public?
Precision fermentation gives society a new production tool.
Whole-system design will determine whether it becomes another extractive industry—or part of a healthier coexistence.
Fewer animals used as machinery.
More land available for life.
More resilient regional production.
Less talking. More doing.