A new study from New York University suggests a potential link between oral health and pancreatic cancer risk, adding to the growing body of research exploring connections between systemic inflammation and cancer growth. Researchers identified a specific microbial community-27 types of bacteria and fungi-associated with a 3.4 times increased risk of developing the disease, according to findings published in the September 2025 issue of JAMA Oncology. While the study demonstrates an association and does not prove causation, it underscores the importance of maintaining good oral hygiene as a potential factor in overall health and disease prevention.
Poor oral hygiene may be linked to an increased risk of pancreatic cancer, according to a recent study. Researchers have identified a specific combination of 27 types of bacteria and fungi that appears to elevate the risk of developing the disease by 3.4 times.
The findings, published in the September 2025 issue of JAMA Oncology, are based on a nearly nine-year study tracking over 120,000 Americans conducted by a team at New York University’s School of Medicine. This research highlights the growing understanding of the connection between oral health and systemic diseases.
The study suggests that this “high-risk” oral microbial community may contribute to pancreatic cancer development through chronic gum inflammation and the resulting systemic inflammation. This process could potentially alter the environment within pancreatic cells, making them more susceptible to cancerous changes.
Researchers theorize that persistent gum infection and chronic inflammation can disrupt the body’s immune balance, leading to a sustained inflammatory response throughout the body. This ongoing inflammation could create a favorable environment for cancer to form.
It’s important to note that this research demonstrates an association, and does not definitively prove a cause-and-effect relationship between oral health and pancreatic cancer. However, the study underscores the close link between oral health, systemic inflammation, and overall metabolic health.
In functional medicine, inflammation is often considered a root cause of many chronic illnesses. The mouth is frequently the first place where signs of chronic inflammation appear, and often goes unnoticed. When the gums are chronically infected, bacterial toxins and inflammatory signaling molecules enter the bloodstream, triggering a low-grade, systemic inflammatory response.
This systemic inflammation can impact several key areas, including:
- Insulin Sensitivity: Inflammatory factors can interfere with insulin signaling, making it harder to regulate blood sugar.
- Liver and Pancreas Function: Metabolites from oral bacteria can travel to the liver via the portal vein, increasing inflammation and potentially affecting pancreatic beta cell function.
- Gut-Oral Axis: Oral pathogens can colonize the gut, disrupting the gut microbiome and leading to intestinal permeability and immune imbalances, further worsening metabolic health.
These findings suggest that the health of the oral microbiome can reflect the body’s overall inflammatory and metabolic balance. Maintaining good oral hygiene through daily brushing and flossing, regular dental checkups and cleanings (every six months is often recommended), a balanced diet low in sugar, avoiding smoking, and adopting an anti-inflammatory diet rich in fruits, vegetables, and omega-3 fatty acids are all important steps.
Neglecting oral health can have far-reaching consequences, potentially contributing to systemic inflammation and increasing the risk of various diseases. Prioritizing good oral hygiene is not only essential for preventing gum disease and cavities, but may also play a role in cancer prevention.
