Mediterranean-Style Diet Linked to Better Gum Health and Lower Inflammation in UK Study

Two hundred patients at a hospital in London sat for dental exams, gave blood samples, and filled out questionnaires about what they eat. From that material, researchers at King's College London have drawn a link between the food on a person's plate and the condition of their gums.

The patients were all enrolled in the King's College London Oral, Dental and Craniofacial Biobank. The team examined their mouths, measured markers of inflammation in their blood, and compared both against how closely each person's diet resembled a Mediterranean pattern. The results were published in the Journal of Periodontology.

The pattern that emerged was fairly consistent. People who did not follow a Mediterranean-style diet tended to have more severe gum disease, and the effect was most visible among those who ate red meat often. In those patients, the researchers also found higher circulating levels of two inflammatory markers: Interleukin-6, known as IL-6, and C-reactive protein, or CRP.

Patients whose meals leaned toward plant foods typical of the Mediterranean diet, including legumes, vegetables, fruit and olive oil, showed lower levels of several inflammatory markers. The Mediterranean diet is generally characterised by fruits, vegetables, whole grains and healthy fats, and it has previously been associated with a lower risk of major diseases such as cardiovascular disease, neurodegenerative disorders and certain cancers.

The researchers point to a plausible route for the connection. Diet can influence the immune system and help moderate inflammation, and that depends on the makeup of what is eaten: macronutrients, micronutrients and phytochemicals. Plant-based diets can contain more of these molecules, which may lead to lower inflammation.

Dr. Giuseppe Mainas, the study's first author and a postdoctoral researcher at King's, said the findings suggest a balanced, Mediterranean-type diet could potentially reduce both gum disease and systemic inflammation. He said there may be a connection between the severity of periodontal disease, diet and inflammation, and that these factors should be considered together when treatment for periodontitis is assessed. He described the work as an important starting point for further research into how food intake relates to gum disease.

Professor Luigi Nibali, the lead author and a Professor of Periodontology at King's, noted that evidence is emerging about the role a balanced diet might play in keeping gums healthy. He said the research shows the potential effect a nutrient-dense, plant-rich diet could have on the nation's gum health, but cautioned that more investigation is needed to develop personalised approaches to help people manage their gum health.

The study is small and observational, which means it shows an association rather than proof that diet changes gum disease. The next step, by the researchers' own account, is more work to untangle that relationship before any tailored dietary guidance for gum patients can be offered.