Flossing Weekly May Reduce Stroke and Atrial Fibrillation Risk
New research indicates that flossing your teeth at least once a week could lower the risk of stroke and atrial fibrillation. This preliminary study, presented at the American Stroke Association’s International Stroke Conference 2025, highlights a connection between oral hygiene practices and cardiovascular health.
The Importance of Oral Health
The significance of maintaining good oral hygiene cannot be overstated. According to global health reports, oral diseases such as untreated tooth decay and gum disease affect an astounding 3.5 billion people worldwide. These conditions are the most prevalent health issues globally. Souvik Sen, M.D., M.S., M.P.H, chair of the Department of Neurology at Prisma Health Richland Hospital and the University of South Carolina School of Medicine, emphasized the study’s focus on identifying effective oral hygiene practices that could contribute to stroke prevention.
Study Details
The Atherosclerosis Risk in Communities (ARIC) study, an extensive investigation of this nature in the United States, analyzed over 6,000 participants to examine the impact of dental flossing. Among them, 4,092 had not experienced strokes, and 4,050 had not been diagnosed with atrial fibrillation (AFib).
Participants were queried about their health status, including high blood pressure, diabetes, high cholesterol, smoking habits, body mass index, education, regular brushing, and routine dental visits. The analysis revealed that flossing was connected to a 22% reduction in ischemic stroke, a 44% reduction in cardioembolic stroke (caused by blood clots from the heart), and a 12% reduction in AFib.
Flossing’s Unique Benefits
The study’s findings suggest that the benefits of flossing were independent of other oral hygiene practices and routine medical care. Importantly, the frequency of flossing appeared to influence its impact on stroke risk reduction. Flossing also decreased the likelihood of developing cavities and periodontal disease.
The data on lowered AFib rates was particularly striking. AFib is the most common type of irregular heartbeat and can lead to stroke and other cardiovascular issues, with an estimated 12 million Americans expected to have AFib by 2030.
The Mechanism of Oral Health and Cardiovascular Disease
Dr. Sen explained the proposed connection between oral health and reduced cardiovascular risk, attributing it to diminished inflammation and infection stemming from better oral hygiene. Flossing promotes overall health, facilitating the adoption of other beneficial habits as well. He noted the affordability and accessibility of flossing as reasons why it should be encouraged.
Implications for Future Research
Commenting on the study, Daniel T. Lackland, Dr.P.H., a professor of epidemiology at the Medical University of South Carolina, highlighted the potential for dental health practices to be integrated into the “Life’s Essential 8” risk factors, which include a balanced diet, regular exercise, smoking cessation, sufficient sleep, ideal weight, controlled blood pressure, stable blood sugar, and healthy cholesterol levels.
Study Background and Limitations
The ARIC study began in 1987 and continues today. Among the 6,258 participants, 82% were self-reported white adults and 18% were black adults, with an average age of 62. Women comprised 55% of the sample.
Exclusions from the study included individuals with total tooth loss, dental implants, existing heart disease, organ transplants, artificial joints, implanted heart valves, or stents, and those who had undergone major surgery.
Conclusion and Actionable Insights
This research suggests that simple habits like regular flossing could potentially lead to significant improvements in heart health. While more studies are needed to establish a direct cause-and-effect relationship, the findings highlight the importance of oral hygiene in overall health.
To protect your cardiovascular health, consider incorporating regular flossing into your daily routine. Making time for this practice could offer substantial benefits beyond just cleaner teeth, potentially reducing your risk of stroke and atrial fibrillation.
Do you floss regularly? Share your experiences in the comments below!
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