Many people who floss do so simply to keep their dentist happy. But lately, headlines have promised a bigger reward: a healthier heart. Is there any truth to this claim, or is it simply hype?
The honest answer falls somewhere in the middle. Researchers have found a real oral-systemic connection, meaning what happens in your mouth can affect the rest of your body. But the research on the connection between flossing and heart disease is still ongoing. Here is what science currently shows, what it cannot prove yet, and which habits help your smile either way.
Does Flossing Really Protect Your Heart? What the Research Shows
One much-discussed study followed more than 6,000 adults for roughly 24 years. In the published results, regular flossers had a 23 percent lower risk of ischemic stroke (a stroke from a blocked blood vessel). They also had a 40 percent lower risk of strokes from clots that travel from the heart and a 12 percent lower risk of atrial fibrillation (an irregular heartbeat).
Those numbers suggest a link between flossing and heart disease risk, but the study has limits. Researchers observed people instead of assigning anyone to floss, and participants reported their habits at the start. Flossers also started with fewer blood vessel risk factors and less gum disease. So the results are promising, but they do not prove that flossing prevents strokes or heart attacks.
How Gum Bacteria Can Travel From Your Mouth to Your Arteries
Your mouth naturally holds hundreds of types of bacteria. When plaque (a sticky film of bacteria) builds up along the gumline, it irritates your gums. Dentists call this earliest stage gingivitis. If it goes untreated, it can become periodontal disease.
Inflamed gums can bleed, which can give bacteria a way into your bloodstream. Harvard Health reports that bacteria from gum disease have turned up in fatty artery deposits far from the mouth. That matters because chronic inflammation contributes to atherosclerosis—the fatty plaque buildup in arteries that raises heart attack risk.
A recent statement from the American Heart Association on gum disease and cardiovascular disease outlines two possible routes. The first possibility is that bacteria might enter the bloodstream through irritated gum pockets and damage blood vessels. Alternatively, long-lasting, low-level systemic inflammation might harm them from within. Both routes remain unproven.
Correlation vs. Causation: What Doctors Actually Know So Far
Here is where careful reading matters. Studies show that gum disease and heart disease often go together, and Harvard Health says people with gum disease are about twice as likely to have a heart attack. But shared risk factors, such as smoking, an unhealthy diet, and limited access to dental care, may explain some of that overlap.
That same statement says doctors have not established causation. It calls for long-term studies and clinical trials to learn whether treating gum disease improves heart outcomes.
The inflammation theory has loose ends as well. Your liver makes C-reactive protein when inflammation is present, so doctors use it as a marker. Yet the flossing study found no difference in that marker between flossers and non-flossers. Still, it’s worth noting that nothing here suggests that flossing harms your heart.
Simple Daily Habits That Support Both Your Heart and Your Smile
While the science on this question might not be settled, it still makes sense to build habits that clearly help your mouth. Harvard Health notes that daily brushing and flossing can even reverse early gum disease, and the American Dental Association recommends this routine:
- Brush twice a day – Brushing clears plaque from your gumline before it hardens into tartar, which only a dental professional can remove.
- Clean between your teeth once a day – Floss or a similar tool reaches the tight spaces where bacteria hide and your brush cannot go.
- Limit sugary drinks and snacks – Sugar feeds the bacteria behind cavities and gum disease, and sugary diets also tend to go along with higher heart disease risk.
- See your dentist regularly – Professional cleanings remove hardened tartar, and exams help catch gum problems early.
Healthy Gums Are a Smart Place to Start
Does flossing prevent heart disease? Researchers still have a lot of work to do on that question. But it is a low-cost habit that protects your gums, and the evidence continues to point to a connection worth taking seriously.
If it has been a while since your last cleaning, Babylon Dental Care can help. Our team is ready to welcome you to a comfortable, judgment-free setting—no matter how long it has been. We can check your gums and show you how to floss comfortably so that you can build a plan that fits your life. Call us at (631) 983-6665 to schedule your visit.