Can Oral Health Impact Your Risk of Alzheimer’s Disease?

It’s no secret that brushing and flossing are vital for a healthy smile — but did you know they may also be protecting your brain?

Emerging research suggests a strong link between oral health and brain health, specifically regarding Alzheimer’s disease. While this connection is still being explored, the findings are clear: what’s happening in your mouth could be affecting your memory.

How Are Gum Disease and Alzheimer’s Connected?

One of the most studied connections is between periodontal disease (severe gum disease) and Alzheimer’s. When plaque builds up on teeth and gums, it can lead to chronic inflammation — not just in the mouth, but throughout the body.

Scientists have found that people with gum disease have a higher risk of developing Alzheimer’s. A study published in Science Advances even discovered the DNA of Porphyromonas gingivalis, a common gum disease bacterium, in the brains of Alzheimer’s patients. This suggests that bacteria from the mouth may travel to the brain and contribute to the formation of plaques linked to cognitive decline.

Inflammation: The Common Denominator

Chronic inflammation plays a key role in both periodontal disease and Alzheimer’s. When your immune system constantly fights off oral bacteria, it may trigger systemic inflammation that affects the brain’s function and structure. Over time, this can damage neurons and accelerate the progression of Alzheimer’s-related changes.

The Role of Oral Hygiene in Brain Health

Good oral hygiene isn’t just about fresh breath — it may be a protective factor against dementia. Here are some habits that may help:

• Brush twice daily with fluoride toothpaste
• Floss or use a water flosser daily
• Visit your dentist at least twice a year
• Avoid smoking, which increases both gum disease and Alzheimer’s risk
• Treat dry mouth (common in older adults), as it can increase bacterial growth

Older Adults Are at Higher Risk

Aging increases both the risk of Alzheimer’s and the likelihood of gum disease. Many older adults may have difficulty brushing due to arthritis or cognitive impairment — which makes early prevention and caregiver support essential.

Final Thoughts

While oral hygiene alone won’t prevent Alzheimer’s, it’s becoming clear that the mouth is a window to brain health. By taking care of your teeth and gums, you’re also taking a proactive step toward protecting your memory and cognitive function.

So the next time you brush, think of it as more than a dental routine — it’s part of your brain-care strategy.