A traditional Chinese herbal powder called Yuchi Powder reduced cavity damage by 37% in tooth enamel and 84% in deeper tooth layers when tested in rats, according to a 2026 study published in the Journal of Ethnopharmacology. Researchers identified three plant compounds in the powder (mulberrin, quercetin, and liquiritigenin) that stop cavity-causing bacteria from growing and forming protective layers on teeth. While these laboratory and animal results are promising, human studies are needed before the powder can be recommended as a cavity-prevention treatment.
Researchers tested a traditional Chinese herbal powder called Yuchi Powder to see if it really prevents cavities, as people have used it for centuries. In laboratory and animal studies, the powder successfully stopped cavity-causing bacteria from growing and forming sticky layers on teeth. Scientists identified three specific plant compounds in the powder that do most of the work: mulberrin, quercetin, and liquiritigenin. According to Gram Research analysis, the highest dose of the powder reduced cavity damage by about 37% in tooth enamel and 84% in deeper tooth layers. These findings provide scientific support for an ancient remedy and could lead to new cavity-prevention products.
Key Statistics
A 2026 research study found that Yuchi Powder at the highest dose reduced cavity damage in tooth enamel by 37% and in deeper tooth layers by 84% compared to untreated rats with artificially induced cavities.
According to laboratory testing in the 2026 study, three plant compounds in Yuchi Powder (mulberrin at 5.15 mg/g, quercetin at 14.67 mg/g, and liquiritigenin at 2.14 mg/g) were identified as the active ingredients responsible for stopping cavity-causing bacteria.
The 2026 research demonstrated that Yuchi Powder successfully inhibited growth of two major cavity-causing bacteria species (S. mutans and S. sanguinis) and reduced biofilm formation, acid production, and protective bacterial coating by 50% or more in laboratory conditions.
The Quick Take
- What they studied: Whether a traditional Chinese herbal powder called Yuchi Powder can prevent cavities and which plant ingredients make it work
- Who participated: Laboratory experiments with cavity-causing bacteria and a rat model with artificially induced cavities. The study did not involve human participants.
- Key finding: The highest dose of Yuchi Powder reduced cavity damage in tooth enamel by 37% and in deeper tooth layers by 84% compared to untreated rats. Three plant compounds in the powder were identified as the active ingredients.
- What it means for you: This research supports the traditional use of this herbal powder for cavity prevention and suggests it works by stopping bacteria from sticking to teeth and producing acid. However, human studies are needed before recommending it as a cavity treatment.
The Research Details
Researchers used two main approaches to test Yuchi Powder. First, they created cavities in rats by exposing them to cavity-causing bacteria and a sugary diet, then treated some rats with different amounts of the powder applied to their teeth twice daily for 50 days. They measured cavity damage using special staining techniques and imaging. Second, they tested the powder in laboratory dishes with bacteria to understand exactly how it stops cavity formation. They also used a technique called bioassay-guided fractionation to identify which specific plant compounds were responsible for the anti-cavity effects.
This research approach is important because it bridges traditional medicine with modern science. By testing the powder in both living animals and laboratory conditions, researchers could confirm that it actually works and identify the specific ingredients responsible. This type of evidence is necessary before any herbal remedy can be considered for development into a real dental product.
The study used multiple measurement methods to assess cavity damage, including visual scoring, special staining, and detailed imaging, which strengthens the reliability of results. The researchers also identified specific chemical compounds and tested their individual effects. However, the study was conducted only in rats and laboratory conditions, not in humans, so results may not directly apply to people. The Journal of Ethnopharmacology is a respected publication for traditional medicine research.
What the Results Show
When rats received the highest dose of Yuchi Powder (50 mg/mL), cavity damage in the hard outer layer of teeth (enamel) dropped from 16.17 to 10.17 on the damage scale, a reduction of about 37%. Damage to the softer inner layer (dentin) dropped even more dramatically from 7.17 to 1.17, a reduction of about 84%. These improvements were statistically significant, meaning they were unlikely to be due to chance. The powder also changed the balance of bacteria in the mouth, increasing diversity of oral microorganisms, which is generally considered healthier than having one dominant cavity-causing species.
In laboratory tests, the powder successfully stopped two main cavity-causing bacteria (S. mutans and S. sanguinis) from growing at specific concentrations. The powder also reduced the sticky biofilm that bacteria form on teeth, decreased the slimy protective coating bacteria produce (called EPS), and lowered the amount of acid bacteria generate. These are all important mechanisms because cavities form when bacteria stick to teeth, produce acid, and create protective layers that resist cleaning.
This research provides the first detailed scientific confirmation of Yuchi Powder’s anti-cavity effects, supporting centuries of traditional use. The identification of three specific active compounds (mulberrin, quercetin, and liquiritigenin) aligns with modern understanding of how plant compounds fight bacteria. These compounds are found in various plants and have shown antimicrobial properties in other studies, so this research connects traditional knowledge with established scientific principles.
The most important limitation is that this study used rats and laboratory bacteria, not human mouths. Cavity formation in humans is more complex and involves many factors beyond just bacteria. The study did not test whether the powder is safe for long-term human use or whether it tastes acceptable. The exact dose that would work in humans is unknown. Additionally, the study did not compare Yuchi Powder to standard cavity-prevention methods like fluoride toothpaste, so we cannot say whether it would be better or worse than existing options.
The Bottom Line
Based on this research, Yuchi Powder shows promise as a cavity-prevention agent with moderate to strong evidence from animal and laboratory studies. However, human clinical trials are needed before it can be recommended as a primary cavity-prevention method. It may be worth exploring as a complementary approach alongside standard dental care, but only after human safety and effectiveness studies are completed. Confidence level: Moderate for laboratory and animal evidence; Low for human application until further research.
Dentists and oral health researchers should pay attention to this work as it provides scientific support for developing new cavity-prevention products. People interested in traditional Chinese medicine and natural oral health approaches may find this research interesting. However, people should not replace their current cavity-prevention routine (brushing, flossing, fluoride) with this powder until human studies confirm its safety and effectiveness. People with allergies to any ingredients in the powder should avoid it.
In the rat study, cavity prevention effects were observed after 50 days of twice-daily treatment. If similar effects occur in humans, people might expect to see benefits within 1 to 2 months of regular use. However, this timeline is speculative until human studies are conducted. Long-term effects and whether benefits continue with continued use remain unknown.
Frequently Asked Questions
Does traditional Chinese herbal powder actually prevent cavities?
A 2026 study found that Yuchi Powder reduced cavity damage by 37% to 84% in rats by stopping cavity-causing bacteria from growing and forming protective layers. However, human studies are still needed to confirm these effects work the same way in people.
What are the active ingredients in Yuchi Powder that fight cavities?
Researchers identified three plant compounds as the main cavity-fighters: mulberrin, quercetin, and liquiritigenin. These compounds work by preventing bacteria from sticking to teeth and producing the acid that creates cavities.
Can I use Yuchi Powder instead of fluoride toothpaste?
Not yet. While the 2026 research is promising, it was only tested in rats and laboratory conditions. Standard fluoride toothpaste has decades of human safety and effectiveness data. Use fluoride toothpaste as your primary cavity prevention until human studies confirm Yuchi Powder works similarly in people.
How long does it take for Yuchi Powder to prevent cavities?
In the rat study, cavity-prevention effects appeared after 50 days of twice-daily treatment. If similar timing applies to humans, benefits might appear within 1 to 2 months, but this is speculative without human research.
Is Yuchi Powder safe to use in your mouth?
The 2026 study did not test safety in humans. While the powder has been used traditionally for centuries, formal safety studies in people are needed before recommending it for regular oral use. Consult a dentist before trying any new oral health product.
Want to Apply This Research?
- Users could track daily oral health using a simple scoring system: photograph teeth weekly under consistent lighting, rate visible plaque buildup on a scale of 1 to 5, and note any sensitivity or discomfort. This creates a personal baseline for monitoring changes over time.
- If using a traditional remedy like this, users should establish a consistent routine by setting phone reminders for twice-daily application at the same times each day, similar to brushing teeth. They could log each application in the app to maintain accountability and track adherence to the protocol.
- Create a monthly oral health dashboard tracking: daily application compliance, subjective plaque appearance, tooth sensitivity levels, and any changes in gum health. Users could also schedule quarterly professional dental assessments to measure cavity development using standard dental metrics, providing objective data to compare against baseline measurements.
This article summarizes research findings about Yuchi Powder’s potential cavity-prevention properties based on laboratory and animal studies. These results have not been tested in humans. This information is educational only and should not replace professional dental care or advice from your dentist. Do not use Yuchi Powder as a substitute for established cavity-prevention methods like brushing with fluoride toothpaste, flossing, and regular dental checkups. Before using any new oral health product, especially if you have allergies, existing dental conditions, or take medications, consult your dentist. The safety and effectiveness of Yuchi Powder in humans remain unproven and require further clinical research.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.