Antiseptic mouthwash is considered an integral part of daily oral hygiene in many households. It promises fresh breath, reduced cavities, and the fight against bacteria in the mouth. However, more and more studies and expert opinions are questioning the benefits of these products. Instead, a completely new approach is coming into focus: probiotics for oral health —specifically, the bacterial strain Streptococcus salivarius M18 .
In this article you will learn:
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Why antiseptic mouthwashes can be problematic
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Which side effects occur frequently
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Why probiotics are a real alternative
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How Streptococcus salivarius M18 contributes to long-term oral health
What is an antiseptic mouthwash?
Antiseptic mouthwashes contain chemicals such as chlorhexidine , cetylpyridinium chloride , or alcohol , which are designed to kill harmful bacteria in the mouth. They are often prescribed for gingivitis, after surgery, or to combat bad breath—and are available over the counter in drugstores and pharmacies.
But the effect of these products is not always as positive as it seems.
The dark side of antiseptic mouthwash: disadvantages and risks
Destruction of the microbial balance
Antiseptic mouthwashes are non-selective—they kill not only harmful but also beneficial bacteria in the mouth. This disrupts the oral flora , which actually plays a key role in protecting against pathogens.
In the long term, this can even increase susceptibility to infections.
Discoloration of teeth and changes in taste
A frequently reported side effect of chlorhexidine-based rinses is discoloration of the teeth and tongue . Taste irritations —such as a metallic taste—can also occur and last for weeks.
Dry mouth and mucous membrane irritation
Many antiseptic rinses contain high levels of alcohol , which can dry out and irritate the oral mucosa . Dry mouth, in turn, promotes the growth of fungi such as Candida albicans and can lead to bad breath.
Increased risk of systemic effects
Some studies suggest that regular use of antiseptic rinses may even be linked to increased blood pressure by impairing nitric oxide-producing bacteria , which play a role in vasodilation.
The better alternative: Probiotics for the oral cavity
Instead of "sterilizing" the entire oral cavity, modern concepts focus on maintaining a healthy microbial balance . This is where probiotics for the oral flora come into play – living microorganisms that have targeted positive effects on oral health .
The trunk is particularly interesting:
Streptococcus salivarius M18 – the natural protection for your teeth
S. salivarius M18 is a beneficial strain of bacteria that occurs naturally in the mouth and throat of many healthy people. It can:
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Displace harmful germs through natural antibacterial substances (e.g. bacteriocins)
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Inhibit plaque and plaque formation
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Prevent gingivitis
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Promote the production of anti-inflammatory enzymes
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Support the remineralization of tooth enamel
Studies show that daily intake of S. salivarius M18 can significantly reduce the risk of tooth decay, gingivitis and bad breath – without any side effects.
Antiseptic mouthwash or probiotics? A clear comparison
| criterion | Antiseptic mouthwash | Probiotics (S. salivarius M18) |
|---|---|---|
| Goal | Kill all bacteria | Promoting beneficial bacteria |
| Effect | Short term | Long-term stabilizing |
| Side effects | Common (discoloration, irritation) | No known side effects |
| Supporting the microbiome | No | Yes |
| Suitable for long-term use | No | Yes |
Conclusion: Say no to chemical treatment – and yes to microbial balance
Antiseptic mouthwashes may be useful in certain situations (e.g., after surgery), but their regular use is problematic . They disrupt the natural balance in the mouth and can do more harm than good.
Probiotics like Streptococcus salivarius M18 offer a modern, natural, and long-term healthy alternative. Instead of eradicating all bacteria, they promote the good ones and help the mouth protect itself.
If your oral health is important to you, it's time to rethink: less chemistry, more biology.
