Here Is Why Mouthwash Could Be Harmful to Your Gut Health

Written by Anna Hartz

Feb.07 - 2025 9:16 PM CET

Health
Photo: Shutterstock
Photo: Shutterstock
The Hidden Risks of Mouthwash: What You Should Know

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If you use mouthwash regularly, you might want to reconsider your choice of product.

Alcohol-based mouthwashes are popular because they kill harmful bacteria in the mouth.

However, they may also affect the balance of beneficial bacteria, which could be bad for your oral and gut health.

Let’s break down why alcohol-based mouthwashes might not be the best option for everyone and explore some alternatives.

Alcohol-based mouthwashes are effective at killing bacteria that contribute to plaque, cavities, and gum disease. However, alcohol doesn't discriminate.

It can kill both harmful and beneficial bacteria. The mouth is home to many types of bacteria that help maintain health. But alcohol can disrupt this balance by killing helpful bacteria, according to Eating Well.

Studies show that using alcohol-based mouthwashes can cause an increase in harmful bacteria, like Fusobacterium nucleatum and Streptococcus anginosus.

These bacteria have been linked to gum disease and even certain cancers.

F. nucleatum is especially concerning because it can contribute to dental plaque, which leads to gum disease.

Some studies have also linked a specific type of F. nucleatum to colorectal cancer. This bacteria can move through the digestive system, where it may increase precancerous growths in the large intestine.

Similarly, S. anginosus can influence bacterial composition and is associated with stomach inflammation and a higher risk of heart disease.

Moreover, alcohol-based mouthwashes may even affect the risk of head and neck cancers. Alcohol is broken down into acetaldehyde in the body, a substance that can cause cancer.

While some research suggests that alcohol-based mouthwashes might have similar effects, more studies are needed to fully understand the long-term impact.

Oral health is closely linked to overall health. Poor oral health can increase the risk of conditions like heart disease and diabetes.

Taking care of your teeth and gums can also help maintain a healthy gut. Using good oral hygiene habits like brushing, flossing, and visiting the dentist regularly can keep harmful bacteria at bay.

If you’re looking for alternatives to alcohol-based mouthwashes, consider options like saltwater rinses, baking soda, or probiotic mouthwashes.

These may help maintain a healthy balance of bacteria in your mouth and support overall health.

Also, lifestyle changes like eating more fiber, exercising regularly, and reducing alcohol and smoking can help support a healthy gut.

In conclusion, while alcohol-based mouthwashes can be effective for oral health, they may have unintended effects on the gut microbiome.

Choosing alcohol-free or probiotic mouthwashes could be a better option for long-term health.