Mouthwashes get a bad rap — scientists found one that lets good bacteria flourish
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Gum and get it.

Mouthwash is commonly recommended for fighting gum disease, but it can also remove beneficial bacteria along with harmful ones.

But a recent study — published in Frontiers in Oral Health — says it doesn’t have to be this way.


hunky dude with mouthwash
Researchers have found a mouthwash — a natural one, at that — that seems to kill off nasty germs while nurturing friendly microbes. IC Production – stock.adobe.com

Researchers have found a mouthwash — a natural one, at that — that seems to kill off nasty germs while nurturing friendly microbes.

“It’s a paradigm shift,” Georgios Kotsakis, assistant dean for clinical research at Rutgers School of Dental Medicine, said in a press release.

“We’re moving from eradicating all bacteria to focusing on selectivity. We want to keep the good bacteria alive while targeting the bad.”

In a study, StellaLife VEGA Oral Care was compared to prescription-strength chlorhexidine and Listerine Cool Mint.

This natural mouthwash reduced harmful bacteria like Fusobacterium nucleatum and Porphyromonas gingivalis while preserving beneficial microbes such as Streptococcus oralis and Veillonella parvula.

“These good bacteria have important functions,” Kotsakis said. “They synergize with your tissues. They actually kill some of the bad bacteria themselves.”


StellaLife VEGA Oral Care Rinse, antimicrobial, peppermint.
Researchers pitted a natural rinse called StellaLife VEGA Oral Care against two common mouthwashes — prescription-strength chlorhexidine and Listerine Cool Mint. StellaLife

In contrast, both Listerine and chlorhexidine nuked all of the bacteria, with chlorhexidine decimating some beneficial bacteria by a staggering million-fold.

Kotsakis said next steps would involve moving to clinical trials.

The findings are refreshing in light of the fact that mouthwash has become a somewhat contentious topic, with even experts disagreeing on how beneficial — or necessary — it is.

Kotsakis himself has a pretty balanced perspective on the issue.

“If you’re brushing and flossing like a dentist — regularly and perfectly — you may not need a mouthwash, but in reality, even the best of us can miss some surfaces during cleaning at home.”

While the Mayo Clinic recommends using mouthwash after brushing and flossing, UK dental surgeon Shaadi Manouchehri suggests doing it the other way around.

“I used to use mouthwash after I brushed my teeth, and this is the worst thing you can do,” she said in a TikTok video that launched quite a debate.

“If you use mouthwash straight after, that’s rinsing away the protective fluoride layer [the toothpaste provides], and it’s going to make your teeth more susceptible to getting cavities.”

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