Root Canal Treatment Linked to Improved Heart and Metabolic Health

Successful root canal treatment may offer benefits beyond oral health, potentially reducing inflammation associated with heart disease and improving blood sugar and cholesterol levels, according to new research.

Researchers at King’s College London tracked changes in blood chemistry after patients received treatment for apical periodontitis, a common dental infection where bacteria invade the root of a tooth and surrounding tissue. Untreated, this infection can allow bacteria to enter the bloodstream, potentially increasing the risk of cardiovascular problems and hindering the body’s ability to regulate blood sugar.^{1, 3}

Dental Infection’s Systemic Impact

The study, published in the Journal of Translational Medicine, revealed that successful root canal treatment was associated with several positive changes:

• Improved Glucose Metabolism: Patients experienced a significant decline in blood glucose levels over two years following treatment, a key factor in diabetes prevention.^{1, 2, 3}
• Enhanced Lipid Profiles: Short-term improvements were observed in blood cholesterol and fatty acid levels, both crucial for heart health.^{1, 2, 3}
• Reduced Inflammation: Key markers of inflammation, often linked to cardiovascular disease and chronic conditions, decreased over time.^{1, 2, 3}
• Oral Bacteria and Metabolism: Microbes from infected teeth were linked to shifts in the body’s overall metabolic processes, highlighting the connection between oral and systemic health.^{1, 3, 4}

How the Study Was Conducted

The research team followed 65 patients from Guy’s and St Thomas’ NHS Foundation Trust for two years after they underwent root canal treatment. They analyzed molecules in the patients’ blood using nuclear magnetic resonance (NMR) spectroscopy to understand how the body processes sugar, fat, and other substances, and how it responds to treatment.^{1, 3}

Integrated Care for Holistic Health

Dr. Sadia Niazi, Senior Clinical Lecturer in Endodontology at King’s College London, emphasized the broader implications of the findings. “Our findings show that root canal treatment doesn’t just improve oral health—it may also help reduce the risk of serious health conditions like diabetes and heart disease,” she stated. “It’s a powerful reminder that oral health is deeply connected to overall health.”^{3, 4}

Dr. Niazi advocates for a move towards integrated care, where dentists and general practitioners collaborate to monitor metabolic markers and protect overall health. “We also demand to move towards integrated care, where dentists and general practitioners function together to monitor the risks through these blood markers and protect overall health. It’s time to move beyond the tooth and embrace a truly holistic approach to dental care.”³

While further research with larger populations is needed, this study provides compelling evidence for the potential of oral care to support general health and well-being.¹

Reference: Zhang, Y., Le Guennec, A., Pussinen, P., Proctor, G., & Niazi, S. A. (2025). Successful endodontic treatment improves glucose and lipid metabolism: a longitudinal metabolomic study. Journal of Translational Medicine. https://doi.org/10.1186/s12967-025-07110-0