Can Your Dental Health Prevent Cancer?

October brings cooler weather, pumpkin spice and, of course, candy. Between Halloween parties and trick-or-treating, sweets seem to be everywhere. While enjoying a few treats is part of the fun, it’s also a good time to remember that your mouth plays a big role in more than just your smile.

Good oral hygiene may do more than protect your teeth. It could also help reduce your risk for certain cancers.

1. Good dental hygiene does more than fight cavities.

Brushing and flossing are everyday steps that protect against gum disease and tooth decay. But research shows they may also play a role in reducing your risk for certain cancers.

Scientists are discovering that the mouth’s microbiome, or the mix of bacteria and fungi that naturally live in your mouth, may influence overall health, including cancer development.

2. Studies show a link between oral microbes and cancer risk.

A 2024 JAMA Oncology study found that 27 types of bacteria and fungi living in the mouth were tied to a 3.5 times greater risk of developing pancreatic cancer. Researchers believe that microbes can travel from the mouth to the pancreas through swallowed saliva, where they may trigger inflammation or other harmful changes.

Similar links have also been observed between oral bacteria and head and neck cancers.

3. A clean mouth supports more than fresh breath.

The same bacteria tied to pancreatic cancer are also associated with periodontal disease, a severe gum infection that damages tissue and bone. Protecting your gums through good dental hygiene may lower inflammation throughout your body and help reduce risk factors linked to chronic diseases, including some cancers.

4. Candy season is a good time to check your habits.

October is Dental Hygiene Month and also Halloween, which makes it a perfect time to be mindful of sugar and oral health.

Here are a few ways to keep your smile — and your body — healthy this season:

• Eat candy in moderation. Enjoy treats in small portions and avoid all-day snacking.
• Brush after indulging. Use fluoride toothpaste to help remove sugar and acids that damage enamel.
• Drink water often. It helps rinse away sugar and bacteria between brushes.
• Schedule your dental checkup. Regular cleanings can catch early signs of gum disease or infection.

5. Prevention starts with small daily choices.

While scientists continue to study how oral microbes influence cancer, one message is clear: Maintaining good oral hygiene is a simple, proven way to protect your overall health. Brushing, flossing and seeing your dentist regularly may not only keep your teeth strong but also help protect against serious disease.

This Halloween, don’t forget to focus on good dental habits. A healthy mouth isn’t just part of your smile — it’s part of your cancer prevention routine.