A Surprising Connection: Flossing and Stroke Risk Reduction
Every year, approximately 795,000 Americans experience a stroke, a leading cause of disability and death in the United States. While common preventative measures include maintaining a healthy diet, exercising, and managing blood pressure, recent research suggests that an often-overlooked habit—flossing—may play a significant role in stroke prevention.
A study led by Dr. Souvik Sen, chair of the neurology department at the University of South Carolina School of Medicine, found that flossing at least once a week is linked to a 22% lower risk of ischemic stroke, a 44% lower risk of cardioembolic stroke, and a 12% lower risk of atrial fibrillation (AFib). Despite this compelling evidence, only about 37% of Americans floss weekly, while nearly 32% never floss at all.
Understanding Stroke and Its Causes
A stroke occurs when blood flow to the brain is blocked or when a blood vessel bursts, leading to potential brain damage. The most common type is ischemic stroke, caused by a blockage in an artery supplying blood to the brain. Another serious type, cardioembolic stroke, happens when a blood clot from the heart travels to the brain. AFib, an irregular heartbeat condition that affects over 5 million Americans, significantly increases the risk of cardioembolic stroke.
How Does Flossing Reduce Stroke Risk?
Flossing helps remove plaque and bacteria from between the teeth and along the gumline, reducing inflammation in the mouth. According to Dr. Sen, oral infections and chronic inflammation may contribute to artery hardening and blood clot formation, increasing stroke risk. By preventing gum disease and reducing bacterial spread, flossing can help maintain vascular health.
Furthermore, the study emphasized that the benefits of flossing were independent of tooth brushing and routine dental visits, suggesting that flossing itself plays a unique role in reducing cardiovascular risk.
The Inflammation Connection: Oral Health and Heart Disease
Inflammation is a well-established risk factor for heart disease and stroke. Periodontitis, a severe form of gum disease, is linked to chronic inflammation that may contribute to systemic health issues. A separate study presented at the American Stroke Association’s International Stroke Conference identified Streptococcus anginosus, a bacterium found in the mouth and gut, as being more prevalent in stroke survivors. This supports the growing belief that oral bacteria influence cardiovascular health.
Flossing: A Simple and Cost-Effective Preventative Measure
Many people cite dental care costs as a barrier to good oral hygiene. However, flossing is an affordable and widely accessible habit that can be easily integrated into daily routines. Dr. Sen noted that increasing the frequency of flossing led to greater reductions in stroke risk, reinforcing the importance of consistency.
For those looking to adopt this habit, selecting a non-toxic dental floss free from per- and polyfluoroalkyl substances (PFAS)—chemicals associated with various health concerns—is recommended. Floss made from nylon or silk and coated with natural wax is a safer alternative.
Other Steps to Reduce Cardiovascular Disease Risk
While flossing can be an essential tool for stroke prevention, it should be part of a broader health strategy. The American Heart Association recommends following Life’s Essential 8, which includes:
- Eating a balanced diet
- Engaging in regular physical activity
- Quitting tobacco use
- Getting adequate sleep
- Maintaining a healthy weight
- Managing cholesterol levels
- Controlling blood sugar
- Regulating blood pressure
The Bottom Line: A Small Habit with Big Benefits
Cardiovascular disease, including stroke, remains the leading cause of death in the U.S., but new research underscores the powerful role of oral hygiene in reducing stroke risk. Flossing is a simple, low-cost habit that may have far-reaching benefits for both dental and cardiovascular health.
Incorporating regular flossing into your daily routine, alongside other healthy lifestyle choices, may be an effective and accessible way to lower your risk of stroke and other cardiovascular conditions. With only a third of Americans currently flossing regularly, increasing awareness of this connection could lead to improved public health outcomes.
