Good oral hygiene is often associated with a bright smile and fresh breath, but new research suggests it may also play a crucial role in reducing the risk of stroke. According to findings presented at the International Stroke Conference 2025, individuals who floss at least once a week have a lower risk of experiencing strokes caused by blood clots originating from the heart. Additionally, they are less likely to develop atrial fibrillation (AFib), an irregular heart rhythm that significantly increases the likelihood of stroke.

The Link Between Oral Health and Stroke Risk

Oral health and cardiovascular health have long been interconnected, with gum disease (periodontitis) being linked to systemic inflammation and an increased risk of heart disease. The recent study sheds new light on how simple oral hygiene habits, like flossing, may contribute to stroke prevention. Researchers analyzed data from thousands of participants, examining their oral health habits, medical history, and incidence of stroke. The results were compelling—those who flossed at least once a week had a noticeably lower risk of stroke compared to those who did not.

How Flossing May Reduce Stroke Risk

Flossing helps remove plaque and bacteria from between the teeth and along the gumline, preventing gum disease and reducing inflammation. Chronic inflammation has been linked to various cardiovascular issues, including stroke. When bacteria from the mouth enter the bloodstream, they can contribute to the formation of arterial plaque, which may lead to blockages and increase the risk of stroke.

Additionally, individuals with poor oral hygiene are more likely to develop endocarditis, an infection of the heart’s inner lining, which can lead to complications such as blood clot formation. These clots can travel to the brain, causing an ischemic stroke. The new research suggests that maintaining good oral health, particularly through flossing, may play a vital role in preventing these dangerous events.

Flossing and Atrial Fibrillation (AFib)

Another key finding of the study was the link between flossing and a reduced risk of atrial fibrillation. AFib is a condition where the heart beats irregularly, increasing the likelihood of clot formation. These clots can travel to the brain, resulting in a stroke. Poor oral hygiene has been associated with inflammation that may contribute to the development of AFib. By flossing regularly, individuals may help lower their risk of developing this serious condition.

How Often Should You Floss?

While daily flossing is ideal, this study suggests that even flossing once a week can provide significant health benefits. The American Dental Association (ADA) still recommends flossing at least once per day to maintain optimal oral health. However, for individuals who find it challenging to floss daily, aiming for a minimum of once a week may still offer cardiovascular advantages.

Other Oral Hygiene Practices That Support Heart Health

Flossing is just one part of a comprehensive oral care routine. To further support both oral and cardiovascular health, consider incorporating the following practices:

• Brushing Twice a Day: Using fluoride toothpaste and brushing for two minutes helps remove plaque and bacteria.
• Using Antimicrobial Mouthwash: This can help kill harmful bacteria that contribute to gum disease and inflammation.
• Regular Dental Checkups: Visiting the dentist at least twice a year can help detect and address oral health issues before they worsen.
• Maintaining a Healthy Diet: Reducing sugar intake and consuming nutrient-rich foods can help keep teeth and gums healthy.

Recommended Water Flosser for Optimal Oral Health

For those looking to enhance their oral hygiene routine, using a water flosser can be a great alternative or addition to traditional flossing. One recommended option is the Onlyone Water Dental Flosser Pick for Teeth, a 300ML Portable Oral Irrigator that is rechargeable and suitable for travel. This professional electric flossing machine helps remove plaque efficiently and supports overall gum health.

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My Unbounded’s Final Thoughts

The connection between oral hygiene and overall health continues to be an important area of research. The latest findings reinforce the idea that simple habits, such as flossing at least once a week, may have a profound impact on reducing stroke risk. Given the growing evidence linking oral health to cardiovascular conditions like AFib and stroke, prioritizing flossing and other oral hygiene practices should be considered a critical part of maintaining overall wellness.

By taking a few extra minutes each week to floss, individuals may not only protect their teeth and gums but also contribute to a healthier heart and a lower risk of stroke.

Sources:

1. American Heart Association. (2025). “Flossing and Stroke Risk: Findings from the International Stroke Conference 2025.” Retrieved from: https://www.heart.org
2. American Dental Association. (2025). “Oral Health and Systemic Disease.” Retrieved from: https://www.ada.org
3. National Institutes of Health. (2024). “Gum Disease and Cardiovascular Health.” Retrieved from: https://www.nih.gov
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