Matcha: A New Weapon Against Gum Disease?

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Periodontitis is a serious inflammatory gum disease caused by a bacterial infection that, if left untreated, can lead to gum recession, tooth loss and other severe systemic health complications, including diabetes mellitus, cardiovascular disease, rheumatoid arthritis, Alzheimer’s disease, and cancer. One of the primary bacterial culprits behind periodontitis is Porphyromonas gingivalis, which colonizes biofilms on tooth surfaces and proliferates inside deep periodontal pockets. Recent research has discovered that matcha, a finely ground green tea powder, may help keep P. gingivalis at bay, offering a new avenue for patients and dentists in preventing and treating periodontal disease.

Matcha and Its Antimicrobial Properties

Matcha comes from the raw leaves of Camellia sinensis. This plant been studied for quite some time for its potential antimicrobial effects against various pathogens. Previous research studies have shown that green tea extract can inhibit the growth of bacteria, fungi, and viruses, including pathogens like Escherichia coli. Specifically, green tea extract has been found to inhibit the growth of P. gingivalis and reduce its adherence to oral epithelial cells. Observational studies have also linked green tea consumption with improved health outcomes.

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The Clinical Study

In a recent study published in Microbiology Spectrum, researchers from the Nihon University School of Dentistry at Matsudo, the National Institute of Infectious Disease in Tokyo, and other institutions tested the efficacy of a matcha solution against 16 oral bacteria, including three strains of P. gingivalis. The matcha mouthwash showed significant bactericidal activity against P. gingivalis, with nearly all cultured cells killed within two hours and complete eradication following four hours of exposure.

Clinical Study Findings

The researchers conducted a follow-up clinical study involving 45 patients diagnosed with chronic periodontitis at the Nihon University Hospital School of Dentistry at MatsudoParticipants were randomly assigned to one of three groups: one group received barley tea mouthwash, another received matcha extract mouthwash, and the third received a mouthwash containing sodium azulene sulfonate hydrate, a common anti-inflammatory agent. Saliva samples were collected before and after the intervention and analyzed using PCR (Polymerase Chain Reaction) with participants instructed to rinse twice daily.

The analysis of the data unveiled a significant reduction in the levels of P. gingivalis in the saliva of patients using the matcha mouthwash. In contrast, the other two groups did not show a similar reduction in bacterial levels. These compelling findings suggest that matcha mouthwash could be a practical tool in the management and prevention of periodontitis by targeting one of its primary bacterial agents.

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What are the potential side effects or drawbacks of using matcha mouthwash as a treatment for periodontitis?

While matcha mouthwash shows promise as a treatment for periodontitis, there are potential side effects and drawbacks to consider:

Allergic Reactions

Some individuals might be allergic to green tea or matcha. Allergic reactions can range from mild symptoms like itching and skin rashes to severe reactions such as difficulty breathing and anaphylaxis.

Staining of Teeth

Green tea, including matcha, can cause staining of teeth over time. The chlorophyll and tannins in matcha can contribute to discoloration, potentially requiring additional dental treatments, like teeth whitening, to maintain a bright smile.

Sensitivity Issues

For individuals with sensitive teeth or gums, matcha mouthwash might exacerbate these conditions. The astringent properties of tannins can sometimes lead to increased sensitivity or irritation.

Caffeine Content

Matcha contains caffeine, and while the amount in mouthwash is likely minimal, it could still be a concern for individuals sensitive to caffeine or consuming large amounts of other caffeinated products.

Potential Interactions with Medications

Green tea can interact with certain medications, including blood thinners, beta-blockers, and some antidepressants. If you are taking any medications, consult with a healthcare provider before using matcha mouthwash.

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Limited Research

While initial studies are promising, more extensive clinical trials are needed to understand matcha mouthwash’s long-term effects and efficacy fully. Current findings are preliminary; further research could reveal additional side effects or limitations.

Taste and Acceptance

The taste of matcha might only be appealing to some. Some individuals might need help to incorporate matcha mouthwash into their daily routine due to its distinctive flavor.

Cost and Accessibility

High-quality matcha can be expensive, and using it as a regular mouthwash might only be cost-effective for some. Additionally, it might not be readily available in all areas, limiting accessibility for some individuals.


While the antimicrobial effects of tea-derived compounds on P. gingivalis have been explored previously, this study underscores the potential of matcha as a natural remedy for periodontal disease. The results indicate that matcha mouthwash can significantly reduce the levels of P. gingivalis, thereby inhibiting the progression of periodontitis and promoting better oral health.

Author Biomarielaina perrone dds las vegas nv

Marielaina Perrone, DDS, is a highly experienced and dedicated dental professional passionate about delivering exceptional patient care. With over 20 years of experience in the dental industry, Dr. Perrone is widely regarded as a leading authority in her field, with a reputation for providing innovative solutions and personalized care to her patients.

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