Regular Flossing Linked to Better Heart Health and Lower Risk of Stroke and Atrial Fibrillation
Maintaining an oral hygiene routine can be an effective way to reduce the risk of cardiovascular diseases, including stroke. According to new research, flossing may help decrease the incidence of atrial fibrillation (AFib) and blood clot-related strokes.
Recent studies also suggest that harmful bacteria in the oral cavity may be associated with a higher risk of stroke. Fortunately, flossing is a simple and affordable habit that can be easily incorporated into daily routines.
The Link Between Oral Health and Cardiovascular Diseases
Cardiovascular diseases, including stroke, remain the leading cause of death in the United States, according to the American Heart Association (AHA). Prevention strategies such as dietary changes and regular physical activity are widely recommended. However, a less obvious ally may already be in your bathroom: dental floss.
While flossing is essential for oral hygiene, research indicates that regular use can also benefit heart and brain health. Studies presented at the American Stroke Association’s International Stroke Conference 2025 reveal that people who floss regularly have a significantly lower risk of certain types of stroke and atrial fibrillation.
Dr. Souvik Sen, chair of the Department of Neurology at Prisma Health Richland Hospital and the University of South Carolina, highlighted that the connection between gum disease and heart problems was already known. Now, new data suggests that flossing may reduce the risk of stroke, with even greater benefits for those who floss more frequently.
Flossing and Reduced Risk of Stroke and Atrial Fibrillation
To investigate this connection, researchers analyzed data from more than 6,000 participants in the Atherosclerosis Risk in Communities (ARIC) study, which began in 1987. The research assessed various lifestyle factors and their effects on atherosclerosis, a condition that causes artery narrowing.
The study focused specifically on the impact of flossing, independent of other oral care factors such as brushing and regular dental visits, on cardiovascular health. About 65% of the participants reported flossing, and after a 25-year follow-up, the findings showed:
- A 22% lower risk of ischemic stroke among those who flossed.
- A 44% lower risk of cardioembolic stroke (caused by blood clots traveling from the heart to the brain).
- A 12% lower chance of developing atrial fibrillation.
Atrial fibrillation is the most common type of irregular heartbeat and a major risk factor for cardioembolic stroke. Experts believe inflammation plays a crucial role in the development of AFib, and further research is needed to fully understand this relationship. However, studies that rely on self-reported data have limitations, as other healthy habits may also contribute to these outcomes.
The Role of Oral Bacteria in Stroke Risk
While the exact reason why flossing may reduce stroke risk remains uncertain, researchers believe that inflammation is a key factor. Periodontal disease, which causes gum inflammation, can contribute to artery hardening and increase cardiovascular risk.
A recent study presented at the International Stroke Conference explored the connection between oral bacteria and stroke risk. Researcher Shuichi Tonomura, from the National Cerebral and Cardiovascular Center in Japan, identified a possible link between the bacterium Streptococcus anginosus and stroke. This bacterium is commonly found in the mouth and gut, but it was found in higher quantities in stroke survivors.
Researchers also discovered that elevated levels of Streptococcus anginosus in saliva and the gut were associated with worse stroke outcomes, including an increased risk of death and other major cardiovascular events.
Tonomura suggested that analyzing gut microbiota could be useful in assessing stroke risk and that eliminating harmful bacteria through proper oral hygiene could be an effective prevention strategy. Similarly, Dr. Sen emphasized that flossing could be an easy and inexpensive way to reduce the risk of cardiovascular diseases.
How to Reduce the Risk of Cardiovascular Disease
According to the AHA’s latest annual report on heart disease and stroke, nearly 1 million deaths were attributed to cardiovascular disease in 2022. This means that, on average, one person in the U.S. dies from CVD every 34 seconds.
Cardiologist Latha P. Palaniappan, professor of cardiovascular medicine at Stanford, emphasized that heart disease has remained the leading cause of death in the country for over a century, surpassing all forms of cancer and accidents combined.
To lower the risk, Palaniappan recommends following the AHA’s Life’s Essential 8 checklist:
Monitor blood pressure
Eat healthier
Be more physically active
Quit smoking
Get quality sleep
Maintain a healthy weight
Control cholesterol levels
Manage blood sugar
Conclusion
Cardiovascular diseases, including stroke, remain the leading cause of death in the United States. While factors such as diet and exercise play a crucial role in prevention, new research suggests that oral health is also important.
Regular flossing may be a simple and cost-effective way to reduce the risk of atrial fibrillation and stroke. Therefore, maintaining good oral hygiene habits could be a valuable step in promoting heart and brain health.
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Conclusion Cardiac arrhythmia can be a silent problem, but its symptoms may indicate something more serious. Pay attention to your body and do not ignore warning signs. Your heart health deserves care and attention!
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Dr. Sarah Miller is widely recognized as an influential leader in the healthcare field, with a career marked by excellence, innovation, and dedication to improving human well-being. Combining exceptional academic knowledge, clinical experience, and a deep commitment to research, she has become a reference in her specialty.
