Affordable Cultivated Meat: Role of Alternative Nutrients
- David Bell
- Apr 28
- 11 min read
Cultivated meat could become an affordable alternative to conventional meat if production costs drop significantly, especially for growth media, which currently accounts for the largest expense. Here's how the industry is tackling this challenge:
Growth Media Costs: Currently hundreds of pounds per litre, they need to fall to around £1 per litre for cultivated meat to be viable.
Key Strategies to Cut Costs:
Serum-Free Media: Eliminates animal-derived components but remains expensive due to recombinant proteins like FGF-2 and TGF-β.
Plant-Derived Nutrients: Utilises agricultural crops or waste, offering cost-effective alternatives to pharmaceutical-grade ingredients.
Fermentation-Based Nutrients: Uses engineered microbes or plants to produce proteins like insulin and growth factors.
Recent Progress:
Companies like Believer Meats and Mosa Meat have reduced serum-free media costs to as low as £0.50 per litre by using food-grade components.
Molecular farming, such as using tobacco plants to produce growth factors, shows promise for further cost reductions.
Environmental Impact: Transitioning from foetal bovine serum to plant-based or fermentation-based nutrients can significantly reduce emissions and resource use.
Challenges Ahead: Scaling up production, addressing batch variability, and bridging the gap between pilot and industrial setups remain hurdles. However, plant-derived nutrients currently offer the most practical path for cost reduction and scalability.
This shift aligns with the vision of producing meat without animal slaughter, addressing both cost and ethical concerns.
How Alternative Nutrients Reduce Production Costs
Growth media, the nutrient-rich liquid that sustains cell multiplication, represents the largest expense in cultivated meat production. Traditionally, foetal bovine serum (FBS) has been the go-to option, but it comes with steep costs, ethical concerns, and scalability issues. Serum-free media (SFM), which eliminates animal-derived components, still accounts for at least 50% of variable operating costs in cultivated meat production [2]. To make cultivated meat more affordable, the industry needs cost-efficient alternatives that still support robust cell growth.
The biggest cost drivers in growth media are growth factors and recombinant proteins. For example, in formulations like Essential 8, a staggering 98% of the costs are tied to just two growth factors: FGF-2 and TGF-β [2]. Additionally, pharmaceutical-grade ingredients significantly inflate costs. Take L-glutamine as an example: reagent-grade costs £452/kg, while food-grade costs just £40/kg - a switch that slashes basal media costs by 77% [2].
Despite these challenges, innovative companies are finding ways to use natural inputs for cultivated meat growth media to bring costs down. In early 2024, Believer Meats showcased a breakthrough: they managed to produce serum-free medium for as little as $0.63 (around £0.50) per litre by replacing pricey albumin and fine-tuning component concentrations [2]. Similarly, Mosa Meat, in collaboration with Nutreco (an animal nutrition company), replaced 99.2% of their basal cell feed with food-grade components. Impressively, this switch maintained cell growth rates on par with those achieved using pharmaceutical-grade inputs [2].
Three key strategies are emerging to tackle these high costs:
Serum-free growth media: Completely removes animal-derived ingredients.
Plant-derived nutrients: Leverages agricultural crops to supply nutrients.
Fermentation-based nutrients: Uses engineered microbes or plants to produce specific proteins.
Each of these approaches offers unique benefits in terms of scalability and cost reduction, setting the stage for further exploration of how these nutrient strategies can transform the industry.
"Feeding cells isn't that different from feeding animals... The majority of nutrients are provided through agricultural crops." - Susanne Wiegel, Head of Alternative Protein Programme, Nutreco [1]
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1. Serum-Free Growth Media
Serum-free media (SFM) eliminates animal-derived ingredients, addressing ethical concerns and improving scalability, though many still wonder how plant-based and cultivated meats compare. Yet, it comes with a hefty price tag: SFM accounts for 50% to over 95% of variable operating costs in cultivated meat production [2][5]. The main expense comes from recombinant proteins like albumin, insulin, and transferrin, which are costly to produce.
Here’s a closer look at how serum-free media is shaping efforts to reduce costs.
Cost Reduction Potential
One of the most effective ways to cut costs is by replacing expensive pharmaceutical-grade ingredients with food-grade alternatives. For instance, swapping human serum albumin (HSA) with food-grade stabilisers like methyl cellulose or starch can reduce stabilisation costs by an astonishing factor of 370 [4][5]. However, even with such dramatic savings, scaling up production remains a significant hurdle.
Scalability
Right now, industrial production capacity isn't sufficient to meet global demand. To replace just 1% of the world's meat consumption, the required amount of recombinant albumin far exceeds current capabilities. That said, molecular farming - using crops like tobacco and barley to produce these proteins - offers a promising solution. Costs for molecular farming are projected to drop to around £0.80 per gramme [2]. However, nutrient needs vary greatly between species and cell types, meaning there’s no one-size-fits-all solution [2][5].
Regional Availability
Global regulatory progress is paving the way for SFM technologies. In January 2023, Singapore's Food Agency approved GOOD Meat's serum-free cultivated chicken [2]. Israel followed suit in January 2024, greenlighting Aleph Farms' serum-free beef [2]. By July 2024, UK-based Meatly gained approval to produce cultivated pet food using serum-free methods [2]. These developments highlight growing support for this technology across different regions.
Environmental Impact
Switching from serum-based to serum-free media has a huge environmental upside. In a standard 10% FBS medium, serum contributes 83% of global warming potential, 88% of eutrophying emissions, and 91% of terrestrial acidification [6]. By transitioning to egg-white protein hydrolysates, these figures drop significantly: global warming potential decreases by 81%, eutrophying emissions by 87%, and terrestrial acidification by 91% [6]. This shift aligns with the Cultivarian vision of producing real meat without the need for animal slaughter.
2. Plant-Derived Nutrients
Plant-derived nutrients represent a practical way to cut production costs by swapping out expensive pharmaceutical-grade ingredients for more affordable food-grade alternatives. Instead of going through the complex and costly process of fermenting over 20 amino acids individually, plant hydrolysates - sourced from soy, rapeseed, or cottonseed - offer a naturally blended and cost-effective solution [1].
Cost Reduction Potential
Switching to plant-derived nutrients has the potential to provide significant savings. Food-grade components are, on average, 82% less expensive than their reagent-grade counterparts at a 1 kg scale [2]. For instance:
L-Tyrosine: £912 per kg (reagent-grade) vs. £83 per kg (food-grade) - a 91% reduction.
L-Arginine: £331 per kg (reagent-grade) vs. £44 per kg (food-grade) - 87% cheaper.
Glucose: £86 per kg (reagent-grade) vs. £18 per kg (food-grade) - 80% cheaper.
Overall, this transition to food-grade components could lower basal media costs by around 77% [2].
In 2024, researchers highlighted the effectiveness of using rapeseed protein isolates - extracted from agricultural waste - as a substitute for recombinant albumin in "Beefy-9" media for cultivating bovine satellite cells [2].
Scalability
Scaling up plant-derived nutrients does come with its challenges. Variability in batches due to differences in raw materials, storage, and processing is a key issue [3]. Additionally, technical hurdles such as the low solubility of some plant proteins and the presence of molecules that may inhibit cell growth need to be resolved [3]. Plant-derived nutrients may also lack certain components found in foetal bovine serum, necessitating precise supplementation [2].
One promising avenue is molecular farming, where genetically modified plants like tobacco, rice, or barley act as bioreactors to produce growth factors and recombinant proteins on a large scale [2]. In September 2023, Israeli startup BioBetter opened a pilot facility using genetically modified tobacco plants to produce growth factors like FGF2, targeting a production cost of just £0.80 per gramme [1].
"Tobacco in particular is an amazing plant. It can make really complex proteins in a cost-effective manner" - Oded Shoseyov, Founder, BioBetter [1]
Regional Availability
North America benefits from an abundant supply of raw materials, with sidestreams from crops like soy, maize, and wheat readily available for upcycling into inputs for cultivated meat [3]. Meanwhile, European and Israeli companies are leading the charge in technical advancements. Dutch firm Nutreco and Israeli startup BioBetter are at the forefront of transitioning to plant-based and food-grade nutrient supply chains [1]. Predicted price targets for plant-derived hydrolysates range from £1.21 to £9.02 per kg, making them competitive with fermentation-derived amino acids. This shift could bring amino acid costs down to under £4 per kg of cultivated meat, a significant drop from earlier estimates of £14–£15 per kg [3].
Environmental Impact
The benefits of plant-derived nutrients extend beyond cost savings. By utilising agricultural sidestreams like okara, soybean meal, and rapeseed protein isolates, these solutions promote a circular bioeconomy and help reduce waste [2]. Additionally, replacing highly purified pharmaceutical-grade ingredients with food-grade plant components lowers the carbon footprint of cultivated meat production [1]. This aligns with the broader goal of producing real meat without the need for animal slaughter, combining cost efficiency with environmental responsibility.
3. Fermentation-Based Nutrients
Fermentation-based nutrients open up a promising way to produce recombinant proteins like insulin, transferrin, and growth factors, which can replace the costly foetal bovine serum often used in cell cultivation [1]. Industrial fermentation already has a strong track record, with amino acids like lysine being produced affordably for animal feed. This success provides a clear model for scaling up other nutrients [1].
Cost Reduction Potential
Fermentation-based methods, much like serum-free and plant-based alternatives, aim to significantly cut costs. For instance, switching from pharmaceutical- to food-grade amino acids could slash costs by up to 100 times while maintaining production yields. Additionally, scaling up fermentation processes could reduce the cost of growth factors by about 35% [1][3].
Currently, the cost of amino acids in cultivated meat production could drop to under £4 per kilogram - an enormous improvement compared to earlier estimates of £14–£15 per kilogram [3]. However, growth factors remain a financial hurdle. In biopharma vs. cultivated meat bioreactors, pharmaceutical-grade production costs can reach millions of pounds per gramme [1]. To make cultivated meat commercially viable, growth media costs need to fall dramatically - from hundreds of pounds per litre to roughly £0.80 per litre or less [1].
Scalability
Scaling fermentation for cultivated meat production comes with its own set of challenges. While large-scale fermentation for amino acids like lysine is well-established, other essential nutrients, such as arginine, are not yet produced in sufficient quantities [1]. Manufacturers are hesitant to invest in larger bioreactors without clear demand signals from cultivated meat producers.
"Most of the cultivated meat companies have not reached a scale that may require hundreds of kilogrammes of these materials. Unless we have visibility into that demand, we cannot invest." - Rajesh Krishnamurthy, CEO, Laurus Bio [1]
Upside Foods is taking bold steps by planning to use 100,000-litre bioreactors for commercial production - far larger than any previously used for animal cell cultivation [1]. Meanwhile, companies like Israel's BioBetter and Spain's Cocoon Bioscience are exploring innovative approaches, such as genetically modified plants and natural bioreactors, to produce growth factors [1].
Regional Availability
Global efforts to scale fermentation-based nutrient production are gaining momentum. India is emerging as a significant player, with Laurus Bio - a major supplier of pharmaceutical-grade growth factors - expanding into the cultivated meat market [1]. In Israel and Spain, companies like BioBetter and Cocoon Bioscience are developing alternative production technologies [1]. The United States is also heavily involved, with California and Illinois leading efforts, including Upside Foods' ambitious plans for large-scale facilities [1].
Environmental Impact
Fermentation-based nutrient production aims to reduce the environmental footprint compared to traditional livestock farming, particularly in terms of fossil fuel, water, and land use. However, producing purified, pharmaceutical-grade ingredients through fermentation could result in higher carbon emissions than conventional meat production [1]. Shifting to food-grade fermentation processes is crucial to meeting both cost and sustainability goals, which are essential for making cultivated meat a viable option.
Advantages and Disadvantages
Each nutrient method comes with its own set of trade-offs, particularly when it comes to cost, scalability, and environmental impact. Below, we’ll break down the benefits and challenges of serum-free, plant-derived, and fermentation-based approaches.
Serum-free media offers high purity and consistency, making it a top choice for controlled production environments. However, the cost of recombinant proteins - ranging from £20 to £133 per litre for albumin - remains a significant hurdle [5]. Switching to food-grade alternatives could reduce basal media costs by an impressive 77% to 82% [2].
Plant-derived nutrients are both cost-efficient and environmentally friendly. Hydrolysates from crops like soy, rapeseed, or wheat can cost as little as £1.64 per kilogramme [2], thanks to existing agricultural infrastructure. Companies like Mosa Meat and Nutreco have already demonstrated success, replacing 99.2% of their basal cell feed by weight with food-grade components [2]. However, one downside is batch variability, which can affect consistency [3].
Fermentation-based methods strike a balance between purity and scalability. Amino acid production, such as lysine for animal feed, is already well-established and provides a useful model [1]. Scaling up these methods could lower growth factor costs by around 35% [1] [3]. On the other hand, the high capital investment required for large bioreactors poses a significant challenge. As Rajesh Krishnamurthy, CEO of Laurus Bio, aptly stated:
"Unless we have visibility into that demand, we cannot invest" [1].
The environmental impact also varies between these methods. Plant-derived hydrolysates can reduce global warming potential by up to 81% and eutrophying emissions by 87% compared to traditional FBS-based media [6]. Meanwhile, fermentation approaches lead the way in land-use reduction, cutting it by up to 17%, and can lower cumulative energy demand by 37% [6].
The choice between these methods often depends on regional resources and production goals. Plant-based solutions are ideal for areas with strong agricultural industries, while fermentation is better suited to regions with advanced biotech capabilities. A promising middle ground is molecular farming, where tobacco plants are used to produce growth factors at a projected cost of £0.82 per gramme [2]. This hybrid approach combines the strengths of both systems, highlighting the importance of tailoring strategies to local needs when adopting alternative nutrient solutions.
Conclusion
Plant-derived hydrolysates present the most practical and cost-efficient solution for scaling up cultivated meat production. While fermentation methods offer consistency, plant-based nutrients provide the critical balance of affordability and scalability essential for commercial success.
The cost savings are undeniable. Amino acid costs could fall to under £4 per kilogramme of cultivated meat - an impressive leap from earlier estimates of £15–16 per kilogramme [3]. With plant hydrolysates priced between £1.24 and £9.27 per kilogramme [3], this target is within reach. Companies like Mosa Meat have already showcased this potential, slashing costs 100-fold by transitioning to food-grade amino acids [1]. Additionally, regions with strong agricultural output can improve food security by utilising upcycled nutrient inputs.
These advancements align with The Cultivarian Society's vision of ethical and accessible food systems. Shifting to plant-based nutrients removes the need for foetal bovine serum, cutting ties with slaughterhouse-derived inputs [1]. At the same time, cultivated meat offers a sustainable alternative to traditional animal agriculture, which currently accounts for 17% of global greenhouse gas emissions [1]. Through advocacy and education, The Cultivarian Society supports a future where meat production is free from animal slaughter, driven by science, compassion, and practical solutions.
Challenges remain, including batch variability, gaps in compositional data, and the technical leap from 2,000-litre pilot tanks to 100,000-litre industrial bioreactors [1][3]. Addressing these hurdles is vital to unlocking the full potential of plant-based nutrient strategies. Still, the direction is clear: plant-based approaches hold the key to making cultivated meat both economically viable and scalable. By leveraging agricultural crop-based supply chains, the industry can pave the way for a sustainable and accessible future in meat production.
FAQs
What exactly is growth media, and why is it so expensive?
Growth media serves as the nutrient-rich solution required for growing animal cells in the production of cultivated meat. It replicates the natural environment for cell growth by including key components such as glucose, amino acids, vitamins, and growth factors.
One of the biggest challenges with growth media is its high cost. This is largely due to the expensive ingredients it requires, particularly growth factors, which can account for up to 90% of the production costs. To address this, researchers are actively working on developing serum-free and more affordable alternatives to help bring down these expenses.
How close are we to achieving growth media costs of £1 per litre at scale?
Recent progress has brought down the cost of producing cultivated meat, with some companies managing to lower it to approximately £8.60 per kilogram. However, one major challenge remains: reducing the cost of growth media to £1 per litre at scale. While strides are being made, this target has yet to be fully realised, and efforts to reach it are ongoing.
Will plant-based or fermentation-made nutrients affect the taste or safety of cultivated meat?
Plant-based or fermentation-derived nutrients might subtly impact the flavour of cultivated meat. However, these nutrients are meticulously crafted to prioritise both safety and affordability. Researchers are continuously working to lower production costs without compromising on stringent safety measures.
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