The surprising link between oral health and brain health
- Michelle Taschereau
- Jun 10
- 3 min read
I just got back from my bi-annual dental check-up and cleaning. You know the routine; rinse, scrape, polish and floss. But as I was sitting in that chair, I started thinking about how much our oral hygiene matters, not just for our teeth, but for our overall health.
In fact, there's growing research showing a strong connection between oral health and brain health. It’s one of those areas that doesn’t get talked about enough, but it really should because what’s happening in our mouths can have a surprising impact on what’s happening in our brains.
It’s true! Emerging research is revealing a fascinating and important connection between the health of our mouth and our cognitive function. It's a fresh reminder how deeply interconnected our bodies are. And when it comes to brain health, the mouth is not a separate system, it’s part of the story.
What the Research Says
Recent studies suggest that poor oral health (especially gum disease (periodontitis)) may be linked to an increased risk of cognitive decline, Alzheimer’s disease, and other neurodegenerative conditions.
Here’s what the research is telling us:
Inflammation: Chronic gum disease creates inflammation in the gums, which doesn’t just stay in the mouth. It can spread through the bloodstream, leading to systemic inflammation that may reach the brain. Neuroinflammation is a known contributor to cognitive decline.
Bacteria and the Brain: Harmful oral bacteria, such as Porphyromonas gingivalis, have been found in the brains of people with Alzheimer’s disease. These bacteria may travel from the mouth to the brain through the bloodstream or nerve pathways.
Cardiovascular and Cognitive Health: There’s a well-established connection between oral health and heart health and since our heart and brain are closely linked, it makes sense that anything affecting one may impact the other.
Inflammation and the brain
Here’s something else that’s important: many of the same culprits that contribute to tooth decay also promote inflammation throughout the body. One of the biggest offenders? Sugar.
Sugar feeds the harmful bacteria in your mouth, increasing the risk of cavities and gum disease.
It also drives inflammation systemically, which can negatively affect brain function, mood, and memory.
Diets high in added sugar have been associated with higher risks of depression, anxiety, and dementia.
In short, what’s bad for your teeth is often just as bad for your brain.
Understanding these connections gives us one more reason to take oral hygiene seriously. It’s not just about a pretty smile or avoiding cavities, it’s part of a much bigger picture of wellness and cognitive longevity.
For anyone focused on brain health, especially those navigating recovery from brain injury, managing neurodegenerative conditions, or simply striving to protect their cognitive function, oral care is an often-overlooked but essential piece of the puzzle.
So what simple steps can we take to support both our brain and our smile?
Here are a few things you can do starting today:
Brush your teeth at least twice a day
Floss daily (yes, it really makes a difference!)
Stay hydrated to support saliva production and reduce bacterial overgrowth
Avoid smoking or vaping, both of which are harmful to oral and brain health
Eat a balanced diet rich in brain-healthy nutrients (like omega-3s, antioxidants, and fiber)
Limit sugar and processed foods to reduce inflammation and decay
Visit your dentist regularly, even when you’re not in pain
Manage stress, which impacts everything from immune function to gum health
These small habits create ripple effects. And over time, they add up to a stronger, healthier brain and body.
Our Bodies Are Brilliantly Connected
The more I learn, the more I see how incredibly interconnected everything is in our bodies. Oral hygiene isn’t separate from brain health, it’s woven into the same system. When we take care of one part, we support the whole. So next time you’re brushing your teeth, give yourself credit. You’re not just doing something good for your mouth, you’re actually investing in your mind, too.
Want to Learn More? Here Are a Few Open-Access Articles to Explore:
If you’re curious and want to read more of the science behind this connection, here are some open-access research articles worth checking out:
Large study links gum disease with dementia.
Poor oral health linked with higher risk of Alzheimer's disease.
The root of the matter: Linking oral health to chronic disease prevention
If you found this helpful and want to explore more brain health strategies, check out our other blog posts or reach out. At Atlas Brain Health, we’re passionate about empowering people with practical tools and real knowledge because your brain health journey should be informed, supported, and totally yours.
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