Tea Blog

The next time you reach for a bottle of mouthwash, you might wonder whether a cup of tea could serve a similar purpose. But is that really the case?

I’ve previously written about tea and oral health in this overview of green tea’s potential benefits for oral hygiene and this earlier discussion of how tea may support dental health. Many of the studies referenced suggest that tea can help reduce oral bacteria associated with bad breath.

One detail worth highlighting from this clinical study on tea rinses and plaque reduction is that participants were asked to rinse their mouths with black tea commonly used in studies examining oral bacteria and plaque control. The findings indicated that repeated rinsing reduced plaque buildup and slowed bacterial growth, although a single short rinse had minimal effect.

Additional research supports similar conclusions. This article outlining multiple ways green tea may support oral health highlights benefits such as cavity prevention, improved gum health, reduced tooth loss, and fresher breath. It also references research suggesting that green tea compounds can outperform certain traditional breath-freshening methods.

Further evidence comes from this study examining the effects of green tea mouthwash on oral malodor, which found that regular use significantly reduced volatile sulfur compounds associated with bad breath in individuals with gingivitis.

However, the issue is not entirely straightforward. While tea may offer oral health benefits, it can also contribute to tooth staining. WebMD ranks tea among the top foods and beverages that can stain teeth, second only to wine. The good news is that teas with lower tannin levels—such as green tea varieties with reduced staining potential and white tea options known for their lighter composition—are generally less likely to discolor teeth.

So, while tea may offer certain oral health benefits, it is probably best used thoughtfully. If you plan to experiment with tea as a mouth rinse, moderation—especially with black tea—is key.

See more of William I. Lengeman’s articles in this archive of tea-related writing by the author.

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