Cardiologist warns ‘poor oral hygiene may raise heart disease risk’: ‘Yes, there’s a microbiome that goes all the way from your nose…’

“Is my oral microbiome linked to my heart health? Yes, there’s a microbiome that goes all the way from your nose, mouth, all the way down to the anus. And each one is specific and can predict whether you’re going to get cardiovascular disease or not,” said Dr Jamnadas. 

He went on to explain, “There’s unequivocal data to show that if you have bad teeth, bad dental hygiene, bad bacteria in your mouth, you’re going to get valvular disease, such as aortic stenosis, premature calcification of your aortic valve, and you’re going to get coronary calcification. That’s been proven unequivocally.”

Dr Jamnadas also drew attention to a lesser-known link between chronic sinusitis and heart disease. “Chronic sinusitis, infections inside your maxillary sinuses, frontal sinuses, constantly, and you get these headaches, and you get the cold, and a blocked nose, and you’re constantly clogged up inside here. That’s inflammation. And oftentimes, that’s also linked to premature coronary artery disease and inflammation in your body, especially when it’s fungal,” he said. 

So, how strong is the scientific evidence linking oral bacteria and poor dental hygiene to heart conditions?

Dr Ravi Prakash, senior consultant-cardiology, PSRI Hospital, New Delhi, tells indianexpress.com, “Scientific evidence linking oral health and cardiovascular disease has become stronger over the last decade. Studies show that bacteria from the mouth, especially those that cause gum disease (such as Porphyromonas gingivalis), can enter the bloodstream through inflamed gums. Once in circulation, these bacteria may contribute to the formation of arterial plaque and inflammation in blood vessels, increasing the risk of coronary artery disease and even aortic valve calcification.” 

While oral bacteria are not the sole cause of heart disease, Dr Prakash mentions, they are considered an independent risk factor that can worsen existing cardiovascular conditions when combined with other risks like high cholesterol, diabetes, and smoking.

 

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In what ways can chronic or fungal sinus infections contribute to systemic inflammation and cardiovascular risk?

Dr Prakash informs that chronic or untreated sinus infections—whether bacterial or fungal—can lead to persistent low-grade inflammation in the body. This constant immune activation releases inflammatory markers such as C-reactive protein (CRP) and interleukins, which are also involved in atherosclerosis (hardening of arteries). 

Over time, this inflammatory state can damage the lining of blood vessels, promoting plaque buildup and reducing vascular elasticity. “Fungal sinus infections, though less common, can cause prolonged immune stress and may further burden the cardiovascular system, especially in people with weak immunity or pre-existing heart conditions.”

Steps to protect the oral microbiome and reduce the impact of oral inflammation on heart health

“Maintaining good oral hygiene is a simple but powerful step for protecting heart health,” explains Dr Prakash, adding that brushing twice daily with a soft-bristled brush, flossing once a day, and using an antimicrobial mouthwash can reduce harmful bacteria in the mouth. Regular dental check-ups and professional cleanings help detect early gum disease before it becomes severe. 

A balanced diet rich in fibre, probiotics, and antioxidants supports a healthy oral microbiome. Avoiding smoking and excessive sugar intake also lowers bacterial growth. “Additionally, staying hydrated helps maintain saliva flow, which naturally protects the mouth from bacterial overgrowth. Consistent oral care, therefore, indirectly supports cardiovascular wellness by reducing chronic inflammation at its source,” concludes the expert. 

DISCLAIMER: This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine.