Chinese Scientists Increase Artificial Starch Production Tenfold as Factory Food Moves Closer

A Faster Route from Waste Gas to Starch

Chinese scientists have increased the productivity of a process that turns carbon dioxide into starch tenfold compared with their breakthrough method announced in 2021, according to the Chinese Academy of Sciences (CAS). The advance brings researchers at the Tianjin Institute of Industrial Biotechnology (TIB) closer to making a major food ingredient in factories, without growing crops on farmland.

The team, led by Professor Cai Tao, has spent the past five years improving a system that combines chemical reactions with enzymes, the biological catalysts that help reactions happen. Their original artificial starch anabolic pathway (ASAP), unveiled in the journal Science in 2021, synthesized starch at a rate 8.5 times faster than corn plants. The latest tenfold productivity improvement puts the reported rate at approximately 85 times that original corn benchmark.

Starch is a complex carbohydrate that supplies calories in food and serves as a raw material for many industries. The researchers' goal is to manufacture it from carbon dioxide, including industrial waste gas, through a controlled process that takes hours instead of the months needed for corn to grow.

As of February 2, 2026, the central challenge is turning that laboratory progress into affordable industrial production. The faster process offers a route toward food manufacturing with much less dependence on farmland, freshwater and agricultural seasons. Its commercial prospects depend on reducing the expense of enzymes and energy while making the system work reliably at a larger scale.

The researchers are therefore pursuing two tasks together: increasing the amount of starch the process can make and lowering the cost of making each batch. A faster reaction is valuable, but the factory must also be able to produce starch at a price competitive with farming.

How Carbon Dioxide Becomes a Food Ingredient

The Tianjin team's pathway uses eleven core reactions to transform gaseous carbon dioxide into starch. It is a chemical and biochemical hybrid: an inorganic catalyst performs the initial conversion, and enzymes carry out the subsequent steps. The system operates without living cells, allowing the researchers to organize the reactions directly.

Carbon dioxide first becomes methanol under controlled conditions. That simple molecule supplies the starting material for a sequence of enzyme reactions that builds sugar units containing three and six carbon atoms. The process then joins those smaller units into the larger structures that make up starch.

Amylose and amylopectin are the two main components of natural starch, and the artificial pathway can produce either. Both are built from sugar units joined together, which is why starch is described as a polymer. The laboratory process assembles those units through a carefully arranged sequence instead of relying on a growing plant.

The researchers drew enzymes from thirty-one different species and selected and modified sixty-two candidates before identifying the ten most effective catalysts. Each enzyme performs a particular job in the sequence. Choosing the right combination helps the reactions proceed quickly enough to create useful quantities of starch.

Plants carry out starch production while also supporting their own growth and other biological activities. The artificial pathway concentrates on the required chemical steps. By removing the need to grow a whole plant, the team can complete the conversion in hours and adjust the reaction conditions directly.

What the Artificial Starch Can Be Used For

Laboratory analyses found that the synthetic starch matched the composition and physical properties of starch produced through agriculture. Those matching characteristics are central to its potential use as a substitute for corn starch in existing products.

Food is only part of that potential market. Starch also goes into pharmaceuticals, paper manufacturing, textiles, adhesives and biodegradable plastics. A factory producing the carbohydrate could therefore supply both food manufacturers and industries that currently obtain their raw material from crops.

The process also allows researchers to adjust the composition of the starch. That could support varieties with particular digestion rates or functional properties suited to different industrial uses. In practical terms, the aim extends beyond making a familiar ingredient: the team wants control over the properties of the ingredient it produces.

Why Enzymes Are Central to the Cost

Cai Tao has described the move from a scientific demonstration to industrial production as a demanding process. In an interview with China Science Daily, the professor explained that proving a method works, making it cheaper and applying it in industry each present their own difficulties.

It's difficult to go from zero to one, it's difficult to reduce costs, and it's even more difficult to achieve industrial application in the end. Nevertheless, we still have to rise to the challenge.

One key enzyme accounted for half of all material expenses in the original 2021 system. That made it a major target for improvement: a reaction can be scientifically successful while still consuming a catalyst that is too expensive for routine factory production.

The team has used artificial intelligence to screen for enzyme variants with greater stability and efficiency. Researchers are also developing ways to reuse the biological catalysts. A more durable enzyme can remain useful for longer, while reuse reduces the need to supply fresh enzymes for every round of production.

Those changes have greatly reduced the quantity of enzymes required while maintaining reaction efficiency. The researchers have also adjusted reaction conditions to reduce energy costs. Together, these efforts address the spending that will determine whether artificial starch can compete economically with starch harvested from crops.

Controlled production provides another advantage. Laboratory conditions allow predictable yields without the seasonal changes and weather exposure that affect farming. Droughts, floods and pests can devastate agricultural output; a factory process gives operators direct control over the conditions in which the starch is made.

How Much Farmland Could a Reactor Replace?

The TIB team calculates that a bioreactor occupying one cubic meter could theoretically match the annual starch output of approximately one-third of a hectare of cornfields. A bioreactor is the vessel in which the biochemical reactions take place. The comparison puts a compact production vessel beside a field that must support an entire crop through a growing season.

The researchers also estimate that, if production costs become competitive with conventional farming, the technology could remove the need for more than ninety percent of the cultivated land and freshwater currently devoted to starch production. Affordability is therefore a condition attached to the projected resource savings.

Industrial starch production currently relies almost exclusively on corn. Growing that crop requires large areas of arable land, substantial irrigation, and heavy applications of fertilizers and pesticides. Replacing part of that production with factory output could reduce demand for those agricultural resources.

Food crops and industrial feedstocks compete for limited farmland. Population growth increases demand, while climate change threatens agricultural yields. Producing industrial starch without a cornfield could leave more land available for food crops or ecosystem restoration.

Ma Yanhe, TIB's founding director, described industrialization in a 2021 statement as both the project's initial ideal and its ultimate goal. He said the team would continue the effort despite the difficulties encountered during development. That ambition places cost reduction and practical manufacturing at the center of the research.

Energy Determines the Carbon Benefits

Carbon dioxide serves as a raw material in the starch pathway instead of being released directly into the atmosphere as industrial waste gas. The process, however, also needs energy, particularly for the initial conversion to methanol and for producing hydrogen through water electrolysis.

Water electrolysis uses electricity to split water and obtain hydrogen. When solar or wind generation supplies that electricity, the process can use renewable energy to help turn carbon dioxide into a carbohydrate. The resulting starch stores energy in its chemical bonds.

The proposed environmental benefit therefore depends partly on how the production system is powered. With renewable electricity, the process could achieve carbon-negative starch production, removing greenhouse gases from the atmosphere while creating a useful commodity. Clean energy is a central part of that proposed manufacturing route.

A 2023 study by the same team, published in Science Bulletin, demonstrated energy efficiency 3.5 times higher and synthesis rates 23 times faster than natural plant systems. Those figures describe that study's comparison with plants; the latest announcement describes a tenfold productivity increase over the team's own 2021 method.

China's expansion of renewable electricity generation and efforts to reduce emissions from its power sector support the broader setting for this research. More clean electricity could make technologies that capture and use carbon dioxide increasingly viable, including processes that turn electrical energy into food ingredients.

Engineered Yeast Offers Another Route

A parallel line of research uses living yeast rather than a system of enzymes operating outside cells. Scientists have engineered the oleaginous yeast strain Yarrowia lipolytica to produce what they call "starch-rich micro-grain." Oleaginous describes a yeast associated with accumulating oils; the researchers have redirected its metabolism toward starch production.

The engineered yeast accumulated starch at levels reaching 47 percent of its dry weight. Researchers achieved this by reworking starch biosynthesis and gluconeogenesis, the pathways involved in making starch and generating the sugars needed to build it. They also changed the cells' shape and size to increase their capacity.

The yeast method reached productivity approximately fifty times higher than traditional crop cultivation when measured in relation to both space and time. That comparison concerns how much can be produced within a given area or volume over a given period, an important consideration for factory production.

Acetate supplies the yeast with a usable feedstock. It can be made from carbon dioxide through an electrical synthesis process powered by renewable electricity, creating another proposed route to carbon-negative food production. The yeast then uses that material through its engineered biological machinery.

The yeast can also consume agricultural waste such as straw when it is combined with acetate. That offers a way to turn cellulose from crop residues into edible starch and make use of agricultural material that is often underused.

The two approaches reach toward the same goal through different methods. The Tianjin enzyme pathway organizes reactions outside living cells, while the yeast approach changes the metabolism of a living organism. Both seek to reduce the dependence of food ingredient production on conventional crop cultivation.

Why China Is Pursuing Factory Starch

China's investment in synthetic starch reflects pressure to supply food while managing limited farmland and water resources per person. The project is presented as a response to the demands of feeding the world's largest population and meeting industrial demand for the same agricultural raw materials.

Agriculture also contributes substantially to national carbon emissions. Fertilizer production, machinery fuel consumption, methane released through rice cultivation and irrigation systems that consume large amounts of energy all contribute to that burden.

Data covering 2005 to 2021 show that China has pursued agricultural management on two scales, combining larger farming operations with shared professional services. The aim has been to reduce carbon intensity while maintaining output. Carbon intensity means the amount of emissions associated with a given level of production.

Those improvements face continuing pressure from climate change and the degradation of arable land. Synthetic starch offers a complementary strategy: meeting some demand through manufacturing could reduce the land required to supply industrial starch, while conventional agriculture continues to produce food.

The potential scale of that change is large. Factory starch could free millions of hectares for ecosystem restoration or food crop cultivation if the process becomes economically competitive. The research links food supply, industrial raw materials, land use and electricity production in a single manufacturing proposal.

From the 2021 Breakthrough to the Latest Advance

The research has developed through several stages, from demonstrating the original pathway to improving energy efficiency and increasing productivity. The figures describe different comparisons, but each addresses a practical question: how quickly the process can make starch, how much energy it needs and whether it can become affordable.

• 2005 to 2021: Agricultural data track China's use of larger farming operations and shared professional services to reduce carbon intensity while maintaining output.
• 2021: The Tianjin team unveiled its artificial starch anabolic pathway in Science, reporting starch synthesis 8.5 times faster than corn plants. Ma Yanhe identified industrialization as the project's initial ideal and ultimate goal.
• 2023: A study by the same team in Science Bulletin demonstrated energy efficiency 3.5 times higher and synthesis rates 23 times faster than natural plant systems.
• By February 2, 2026: CAS reported a tenfold productivity increase over the 2021 method after five years of optimization, alongside efforts to reduce enzyme and energy costs.

No date was given for commercial deployment. The work now centers on the practical demands Cai identified: reducing costs, scaling production and achieving industrial application. Faster reactions, reusable enzymes and cheaper energy all contribute to that effort.

The promise is a new source of starch that can operate without waiting for a harvest. Whether through enzymes or engineered yeast, the researchers are working toward manufacturing a familiar carbohydrate from carbon dioxide and other feedstocks, with less demand for farmland and freshwater.

Key Points

• TIB researchers led by Professor Cai Tao increased artificial starch productivity tenfold compared with their 2021 method, according to CAS.
• The original rate was 8.5 times faster than corn plants; applying the latest improvement gives approximately 85 times that original benchmark.
• The pathway uses eleven core chemical and enzymatic reactions to turn carbon dioxide into starch matching agricultural starch in composition and physical properties.
• A reactor occupying one cubic meter could theoretically match the annual starch output of about one-third of a hectare of cornfields.
• If costs become competitive, the technology could save more than ninety percent of the cultivated land and freshwater used for starch production.
• Artificial intelligence, more stable enzymes, catalyst reuse and improved reaction conditions are helping address production costs.
• Engineered Yarrowia lipolytica yeast reached starch content of 47 percent of dry weight and productivity approximately fifty times higher than crop cultivation by space and time.
• Renewable electricity could support carbon-negative production. No commercial deployment date was given.