Is hydrogen peroxide mouthwash effective against infections (STD) ?

Image mouth wash

Roger-Luc Chayer (Image: AI – Gay Globe)

Many medical studies have already shown that the original Listerine mouthwash (but not other versions) is highly effective against certain STIs, such as gonorrhea and oropharyngeal chlamydia. It can even provide protection if used immediately after a risky contact with bodily fluids, whether during sexual intercourse or a deep kiss with an unknown person.

Other research is underway to assess the effectiveness of hydrogen peroxide mouthwash and determine if similar conclusions can be drawn. These studies aim to find an antiseptic agent capable of preventing the transmission of certain STIs, in the context of the global resurgence of these infections and the concerning rise of antibiotic resistance.

Use by Dentists

Dentists already include hydrogen peroxide mouthwash in their preoperative protocol to sterilize the mouth before more invasive procedures. Since the COVID era, they have also used it to reduce viral presence before any dental exam or treatment.

However, recent studies show that this type of mouthwash has no effect on oral COVID or on the transmission of the virus through aerosols.

What are the general benefits of this type of mouthwash?

Hydrogen peroxide mouthwash still offers some benefits. First, it is highly effective in treating infections of the mouth, throat, or in cases of ulcers. Rinsing with it helps speed up the healing of these minor conditions.

Hydrogen peroxide mouthwash is also very effective against plaque, which sometimes can remain uncontrolled even after excellent tooth brushing. Dental plaque is a sticky, colorless film made up of bacteria, food residues, and saliva that constantly forms on the teeth. It primarily accumulates along the gum line and between the teeth.

When plaque is not removed by brushing and flossing, it can harden and turn into tartar, which is more difficult to remove. Dental plaque is one of the leading causes of oral problems, such as cavities and gum diseases (gingivitis and periodontitis).

A study published in the International Journal of Dentistry on October 31, 2020, based on a systematic review of the effect of hydrogen peroxide mouth rinsing on clinical and microbiological parameters related to plaque, gingivitis, and microbes, concluded that the majority of the included studies were performed with 1.5% hydrogen peroxide. Results related to plaque accumulation generally show a slightly better effect of hydrogen peroxide compared to placebo mouthwashes. Rinsing with hydrogen peroxide has the potential to affect plaque, gingivitis, and oral bacteria, compared to placebo.

And what about STIs?

Unfortunately, studies show that hydrogen peroxide is absolutely ineffective against viruses or STIs such as gonorrhea, chlamydia, or syphilis.

Conclusion

Hydrogen peroxide mouthwashes are useful for treating minor infections and injuries in the mouth, but unlike original Listerine, they cannot be used to prevent STIs. It is important to note that it is not recommended to use the 3% hydrogen peroxide commonly found on the market, as this formula may have negative effects by killing both harmful and beneficial bacteria, which are necessary for good oral health.

It is advised to only use hydrogen peroxide mouthwashes sold in pharmacies or other stores, such as those from brands like Colgate, Crest, or other store brands, which are formulated to be less risky to health while providing gentle teeth whitening.

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