Researchers created a new resistant starch by mixing corn and sorghum starch with stearic acid and spray-drying it into powder. According to Gram Research analysis, the best formula resisted digestion by 63-68%, meaning your body can’t break it down like regular starch, potentially helping control blood sugar spikes. The powder stayed stable in cold storage and showed prebiotic benefits, but human studies are still needed to confirm real-world benefits.
Scientists created a new type of resistant starch by mixing starch from sorghum and corn with stearic acid (a natural fat), then spray-drying it into powder. According to Gram Research analysis, this new starch resists digestion better than regular starch, which means it doesn’t spike your blood sugar as quickly. The best results came from using 5% stearic acid, creating starch that stayed stable even after sitting in the cold for two weeks. This powder could be added to bread, pasta, and cereals to make them healthier without changing how they taste or feel in your mouth.
Key Statistics
A 2026 laboratory study published in the Journal of Food Science found that starch complexed with 5% stearic acid created resistant starch levels of 63.76% in corn and 67.87% in sorghum, compared to regular starch which is almost completely digestible.
Researchers discovered that starch mixed with 1-3% stearic acid showed prebiotic activity scores of 0.01-0.19 after 80 hours of simulated digestion, suggesting it could feed beneficial gut bacteria.
The spray-dried starch powder had a particle size of 25-37 micrometers, fine enough to blend seamlessly into wheat flour without changing the texture of bread or pasta.
Starch-stearic acid complexes showed reduced breakdown (lower retrogradation enthalpies) after 14 days of cold storage, indicating improved stability for food products.
The Quick Take
- What they studied: Whether mixing starch with stearic acid (a natural fat) and spray-drying it would create a starch that your body digests more slowly, keeping blood sugar more stable.
- Who participated: This was a laboratory study testing different starch formulas, not a human trial. Researchers used sorghum and corn starches mixed with different amounts of stearic acid.
- Key finding: Starch mixed with 5% stearic acid created resistant starch that resisted digestion by 63-68%, compared to regular starch. The powder stayed stable in cold storage and showed potential prebiotic benefits (feeding good gut bacteria).
- What it means for you: If this technology reaches food products, bread and pasta made with this starch could help keep your blood sugar steadier after eating. However, this is early-stage research—human studies are still needed to confirm benefits. Talk to your doctor before making major dietary changes.
The Research Details
Researchers created a new type of starch in a laboratory using a pilot-scale tank. They mixed sorghum and corn starches with stearic acid at three different strengths (1%, 3%, and 5%) while heating the starch. Then they spray-dried the mixture into a fine powder, similar to how instant milk powder is made. This process creates what scientists call ‘resistant starch’—starch that your digestive system can’t break down as easily as regular starch.
Once they had the powder, they tested it in multiple ways. They looked at its crystal structure using X-ray technology, measured how it behaves when heated, and tested how quickly it would be digested. They also checked whether it could feed beneficial bacteria in your gut (called prebiotic activity) by simulating what happens in your intestines for 80 hours.
The researchers specifically looked at how the starch changed during cold storage for 14 days, since foods sit in refrigerators and freezers. They wanted to make sure the powder stayed stable and didn’t break down or change texture over time.
This research matters because resistant starch has been linked to better blood sugar control and improved gut health. By creating a powder form that can be easily mixed into regular foods, manufacturers could make everyday bread and pasta healthier without people noticing a difference. The spray-drying method creates a very fine powder (25-37 micrometers) that blends smoothly into flour, which is important for keeping food texture and taste normal.
This is laboratory research testing the starch’s physical and chemical properties—it’s not a human study yet. The researchers used established scientific methods (X-ray diffraction, thermal analysis, and simulated digestion tests) to measure their results. However, because no human participants were involved, we can’t yet confirm that eating foods made with this starch would actually help real people control their blood sugar. The study was published in the Journal of Food Science, a peer-reviewed scientific journal. More research, including human trials, would be needed before this technology appears in store-bought foods.
What the Results Show
The key finding was that starch mixed with 5% stearic acid created the most resistant starch: 63.76% for corn starch and 67.87% for sorghum starch. This means that when your digestive system tries to break down this starch, it can’t process most of it—the starch passes through your system largely unchanged. This is important because regular starch gets broken down quickly into sugar, which spikes your blood glucose. Resistant starch doesn’t cause this spike.
The researchers confirmed this worked by looking at the starch’s crystal structure. They found that the stearic acid formed special V-shaped complexes with the starch molecules, which is the structure that makes starch resistant to digestion. The more stearic acid they added (up to 5%), the more of these protective complexes formed.
Another important finding was stability: the starch-stearic acid complexes didn’t break down or change much after sitting in cold storage for 14 days. This matters for food manufacturers because products need to stay consistent on store shelves and in home refrigerators. The corn starch complexes were especially stable when heated, which is important since bread and pasta are cooked.
The researchers also tested whether this new starch could feed beneficial bacteria in your gut (prebiotic activity). Starches mixed with 1-3% stearic acid showed the best prebiotic scores after 80 hours of simulated digestion. This suggests the starch could act like a prebiotic—a food that helps good bacteria grow in your intestines. This is a bonus benefit beyond blood sugar control, since a healthy gut microbiome is linked to better digestion and immune function. The spray-drying process created a very fine powder (25-37 micrometers), which is small enough to blend seamlessly into wheat flour without changing how bread or pasta feels when you eat it.
Resistant starch isn’t new—scientists have known for years that it helps control blood sugar and may support gut health. What’s new here is the method: creating resistant starch by complexing it with stearic acid and spray-drying it. Previous methods often created resistant starch that didn’t blend well into regular foods or changed their texture. This new approach appears to solve that problem by creating a fine powder that manufacturers can easily add to existing products. The V-type starch complexes formed in this study match what previous research has shown works best for resisting digestion.
This study only tested the starch in a laboratory—no humans ate foods made with it. Laboratory digestion tests (simulating what happens in your stomach and intestines) don’t perfectly match what happens in real human bodies. The study didn’t test how much of this starch people would need to eat to see blood sugar benefits, or whether the benefits would last over time. It also didn’t test whether the starch would work the same way in all types of foods or whether cooking methods might affect it. Finally, the study didn’t measure whether people would actually like the taste and texture of foods made with this starch. Human clinical trials would be needed to confirm all these questions.
The Bottom Line
This research is promising but preliminary. If you’re interested in resistant starch for blood sugar control, current options include beans, lentils, cooled cooked potatoes, and whole grains—all proven in human studies. Wait for human clinical trials before expecting this specific starch in foods. If it does appear in products, it would likely be a helpful addition to a balanced diet, but shouldn’t replace other healthy eating habits. Confidence level: Low to moderate (laboratory research only, no human data yet).
People with prediabetes or type 2 diabetes who want to manage blood sugar should follow this research, but shouldn’t change their diet based on this study alone. People interested in gut health and prebiotics may find this interesting. Food manufacturers and nutritionists should watch for further developments. People without blood sugar concerns don’t need to make changes based on this research. Anyone with diabetes should talk to their doctor before making dietary changes.
If this starch reaches consumer products, it would likely take 2-5 years minimum. First, human studies need to confirm it works in real people. Then, food companies would need to develop products, test them, and get regulatory approval. Even after products launch, it might take weeks to months of regular consumption to notice blood sugar benefits, similar to other dietary changes.
Frequently Asked Questions
What is resistant starch and why does it matter for blood sugar?
Resistant starch is starch your digestive system can’t break down easily, so it doesn’t spike your blood sugar like regular starch does. A 2026 study found that starch mixed with stearic acid created resistant starch levels of 63-68%, potentially helping control glucose spikes after meals.
Can I buy foods made with this new starch right now?
Not yet. This is laboratory research, not yet tested in humans. Food manufacturers would need to develop products and conduct human trials before this starch appears in stores, likely taking 2-5 years minimum.
Is resistant starch safe to eat?
Resistant starch from food sources like beans and cooled potatoes is safe and studied in humans. This specific starch-stearic acid complex hasn’t been tested in people yet, so safety in humans remains unknown. Talk to your doctor before trying new starch products.
What foods could have this starch added to them?
According to the research, this powder could be added to pasta, bread, and breakfast cereals because it blends smoothly without changing texture or taste. The fine powder (25-37 micrometers) mixes easily into wheat flour.
Does this starch help your gut bacteria like probiotics do?
The laboratory study suggests it might act as a prebiotic—feeding good gut bacteria. Starch mixed with 1-3% stearic acid showed prebiotic activity in simulated digestion tests, but human studies are needed to confirm this benefit.
Want to Apply This Research?
- If you try foods made with this starch (once available), track your blood sugar readings 2 hours after eating and compare them to your readings after eating regular bread or pasta. Note any patterns in energy levels or hunger between meals.
- Start incorporating proven resistant starch sources now: eat cooled cooked potatoes, add beans to meals, or choose whole grain bread. Log these foods in your app to establish a baseline before new starch products become available.
- Create a ‘resistant starch’ food category in your app. Track which resistant starch sources you eat, your energy levels, and any digestive changes over 4-8 weeks. Compare your blood sugar patterns (if you monitor) before and after increasing resistant starch intake.
This article discusses laboratory research that has not yet been tested in humans. The findings are preliminary and should not be used to make medical decisions. Resistant starch products discussed are not yet available for consumer purchase. If you have diabetes, prediabetes, or other blood sugar concerns, consult your healthcare provider before making dietary changes. This research is not a substitute for medical advice, diagnosis, or treatment. Always talk to your doctor before starting new supplements or making significant dietary changes, especially if you take medications that affect blood sugar.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.
