What Happens in Your Gut Is Also Reflected in Your Mouth

In consultations, more and more patients tell us that they have changed their diet to improve their digestive health or that they are taking probiotics to care for their intestinal microbiota. Curiously, many of them continue to have problems in their mouth: gum inflammation, bad breath, recurrent cavities, or even oral infections like candidiasis.

This raises the big question: Is our gut health connected to that of our mouth? The answer is a resounding yes.

Today we will talk about intestinal dysbiosis and its relationship with the oral cavity because we are not only what we eat… we are also what our bacteria do with what we eat.

What is Intestinal Dysbiosis?

The intestinal microbiota is composed of trillions of bacteria that play an essential role in digestion, nutrient absorption, and immune system function. Under normal conditions, this ecosystem remains in balance (eubiosis), allowing beneficial bacteria to control pathogenic ones.

But when there is an alteration in the microbiota—whether due to an inadequate diet, excessive use of antibiotics, chronic stress, or metabolic diseases—harmful bacteria can proliferate uncontrollably, creating a state called intestinal dysbiosis.

This alteration not only affects the digestive system with symptoms like bloating, gas, diarrhea, or constipation but can also impact the health of the oral cavity.

How Does Intestinal Dysbiosis Affect Oral Health?

The connection between the mouth and the gut is no coincidence. They communicate through saliva, blood, the immune system, and the vagus nerve, a highway of information between the brain and the digestive tract.

When there is intestinal dysbiosis, several phenomena occur that can harm the health of the mouth:

• Systemic Inflammation: Intestinal dysbiosis can increase inflammation throughout the body, predisposing to gum diseases like periodontitis.

• Alteration of the Immune System: An unbalanced gut affects the immune response, facilitating oral infections like candidiasis or the proliferation of pathogenic bacteria in the mouth.

• Migration of Bacteria: Some intestinal bacteria can reach the mouth through the bloodstream or even gastroesophageal reflux, contributing to problems like bad breath or enamel erosion.

• Nutritional Deficiencies: Dysbiosis can affect the absorption of vitamins and minerals key to oral health, such as vitamin D, calcium, and vitamin K2, essential for the strength of teeth and gums.

How Can You Suspect That Intestinal Dysbiosis Is Affecting Your Mouth?

If you experience some of these symptoms, it is possible that your intestinal microbiota is affecting your oral health:

• Inflamed gums or gums that bleed easily without a clear cause.

• Frequent appearance of canker sores or mouth ulcers.

• Persistent halitosis (bad breath) that does not improve with oral hygiene.

• Feeling of dry mouth or changes in saliva.

• Oral candidiasis, with white patches on the tongue or palate.

• Greater predisposition to cavities, even with good oral hygiene.

• Recurrent digestive symptoms like bloating, gas, or changes in bowel movements.

If you notice several of these signs, there may be a connection between your intestinal microbiota and your oral health.

How Can Intestinal Dysbiosis and Its Impact on the Mouth Be Diagnosed?

In dental consultations, there are specific tests to assess the balance of the oral microbiota and detect if there is dysbiosis. Some of the most commonly used are:

• Oral and Intestinal Microbiota Analysis: There are tests that allow identifying the composition of bacteria both in the mouth and the intestine, detecting possible imbalances.

• Systemic Inflammation Tests: Inflammatory markers in blood and saliva can be measured to assess the impact of dysbiosis on the body.

• Salivary pH and Digestive Function Tests: They help determine if the oral environment is being altered by digestive problems.

What to Do If You Have Intestinal Dysbiosis and Oral Problems?

If it is confirmed that intestinal dysbiosis is affecting your mouth, we can take measures to improve the balance of both microbiotas:

• Take Care of Your Diet: Increase the consumption of fiber, fruits, and vegetables; reduce ultra-processed foods, sugars, and refined flours.

• Incorporate Probiotics and Prebiotics: Depending on the case, they can be useful to restore the bacterial balance in the intestine and mouth.

• Optimize Oral Hygiene: Use proper brushing techniques, dental floss, and oral irrigators to reduce the pathogenic bacterial load.

• Regular Professional Check-Ups: Monitor the health of gums and teeth to detect any signs of inflammation or disease.

• Stress Management: The gut-brain axis is directly influenced by stress, which can worsen dysbiosis and its effects on the mouth.

• Oral Hygiene and Ozone Therapy Sessions: Maintaining optimal oral hygiene combined with ozone therapy can help reduce the pathogenic bacterial load, balance the microbiota, and promote the regeneration of oral tissues.

Conclusion

The health of your mouth and your gut are more connected than you might have imagined. If you suffer from digestive problems and, at the same time, notice signs of inflammation in your mouth, it is possible that intestinal dysbiosis is affecting your oral microbiota.

Taking care of both is key to complete well-being. If you suspect you may be going through this situation, remember that there are tests and treatments to help you regain the balance of your microbiota and, with it, your oral and overall health.

Scientific References:

• Kho ZY, Lal SK. The human gut microbiome – A potential controller of wellness and disease. Front Microbiol. 2018.
• Kitamoto S, Nagao-Kitamoto H, Hein R, Schmidt TM, Kamada N. The Bacterial Connection between the Oral Cavity and the Gut Diseases. J Dent Res. 2020.
• Yamashita Y, Takeshita T. The oral microbiome and human health. J Oral Sci. 2017.