You brush twice a day, avoid sugary snacks, and floss every night. You're doing everything right — or so you think.
What if the very floss you're using is introducing toxic chemicals directly into your bloodstream?
A growing body of research has found that many popular dental flosses — including bestselling brands like Oral-B Glide — are coated with PFAS (per- and polyfluoroalkyl substances), the same "forever chemicals" used in non-stick cookware. A 2019 study published in the Journal of Exposure Science & Environmental Epidemiology found that women who used certain dental flosses had significantly higher PFAS levels in their blood.
The good news: there's a simple, time-tested alternative that your great-grandparents would recognize. Beeswax dental floss uses 100% natural beeswax as its coating — no synthetic chemicals, no forever chemicals, and no compromise on performance.
In this article, you'll learn exactly what PFAS is, why it ends up in dental floss, what to look for on the label, and why beeswax is the cleanest, most effective natural coating available.
What Are PFAS and Why Are They in Dental Floss?
PFAS stands for per- and polyfluoroalkyl substances — a family of over 12,000 synthetic chemicals that have been used in manufacturing since the 1940s. They're called "forever chemicals" because they don't break down in the environment or in your body. They accumulate over time, and have been linked to:
- Thyroid disease and hormone disruption
- Increased risk of certain cancers
- Immune system suppression
- Elevated cholesterol levels
- Developmental problems in children
So why are they in dental floss? The coating on "easy glide" floss — that silky-smooth finish that slides effortlessly between tight teeth — is often made from PTFE (polytetrafluoroethylene), a type of PFAS. It's the same substance as Teflon. Manufacturers use it because it reduces friction and makes flossing feel easier.
The problem: floss sits directly against your gum tissue, one of the most absorptive surfaces in your body. Unlike your skin, your gum tissue has a rich blood supply just millimeters away. Any chemical on your floss isn't just touching you — it has a direct route into your bloodstream.
According to a 2025 Consumer Reports investigation, if a dental floss doesn't explicitly disclose its coating, or uses vague terms like "wax coating" without specifying the source, there's a good chance it contains petroleum-derived or PTFE-based wax. The safest flosses clearly state their coating: beeswax, carnauba wax, candelilla wax, or jojoba wax.
Why Beeswax Is the Gold Standard for Natural Dental Floss
Beeswax has been used as a coating for thread and cord for thousands of years. Sailors waxed their rigging with it. Cobblers waxed their thread. And long before synthetic waxes existed, beeswax was the natural choice for dental floss.
Here's why beeswax stands out among natural alternatives:
1. Completely non-toxic and food-safe
Beeswax is approved as a food additive (E901) by the FDA, EU, and Health Canada. It's used to coat candies, fruits, and cheese. There is zero health concern around beeswax — it has been safely used by humans for millennia.
2. Natural antimicrobial properties
Beeswax contains trace amounts of propolis — a natural antimicrobial compound produced by bees. While the concentration in floss coating is small, beeswax has a natural resistance to bacterial growth that synthetic waxes don't have.
3. Excellent glide without chemicals
Beeswax provides a smooth, natural glide that works just as well as synthetic coatings for most people. It softens slightly at body temperature, conforming to the floss fiber and creating a consistent, comfortable slide between teeth.
4. Biodegradable and sustainable
Beeswax is fully biodegradable. Unlike PTFE, which persists in the environment indefinitely, beeswax breaks down naturally. If you're on a zero-waste journey, beeswax floss — especially in compostable or recyclable packaging — is the only truly sustainable option.
5. No greenwashing
"Natural" and "eco-friendly" are unregulated marketing terms. But beeswax is a specific, verifiable ingredient. When a floss label says "coated with 100% beeswax," you know exactly what you're getting.
How to Read a Dental Floss Label (And What to Avoid)
Next time you're buying floss, flip the package over and look for the coating ingredient. Here's a quick guide:
| What the label says | What it means |
|---|---|
| "PTFE coated" or "Teflon-style" | Contains PFAS — avoid |
| "Easy glide" or "silky smooth" with no ingredient list | Likely PTFE — treat as suspect |
| "Wax coated" (no wax type specified) | Could be petroleum wax or PTFE — ask or skip |
| "Beeswax coated" | Natural, non-toxic, safe |
| "Carnauba wax" or "candelilla wax" | Plant-based, safe (vegan alternative) |
| "Natural wax" with no specifics | Ambiguous — look for more detail |
Making the Switch: What to Expect
If you've been using easy-glide PTFE floss for years, switching to beeswax floss takes a small adjustment:
- The feel is slightly different. Beeswax floss has a little more texture than ultra-slick PTFE. Most people adjust within a week.
- It works best for wider gaps. If you have very tight contacts between teeth, beeswax floss may require more effort. Try waxed silk floss for added strength.
- It smells faintly of honey. This is completely normal — and many people find it pleasant.
- It's better for the planet. Beeswax floss, especially in glass or cardboard packaging, is one of the most sustainable oral care products available.
Practical tip: Warm the floss briefly between your fingers before use. The gentle heat slightly softens the beeswax coating, improving glide between tight teeth.
Conclusion
Your dental floss is a daily habit — used 365 days a year, pressed directly against the most absorptive tissue in your mouth. It's worth taking 30 seconds to check the label.
Three things to remember:
- "Easy glide" floss is often PTFE-coated — check the label
- Beeswax is the safest, most natural floss coating available
- Switching is easy and your body will thank you
FAQ
Q: Is all beeswax dental floss PFAS-free?
A: Yes — beeswax is a 100% natural wax with no synthetic fluorochemicals. Any floss listing "beeswax" as its coating is PFAS-free. Always verify the ingredient list.
Q: Does beeswax dental floss work as well as regular floss?
A: For most people, yes. People with very tight dental contacts may prefer waxed silk floss for added strength.
Q: Is beeswax floss vegan?
A: No — beeswax is animal-derived. Vegan alternatives include carnauba or candelilla wax. Both are PFAS-free.
Q: Where can I buy beeswax dental floss?
A: Most health food stores and zero-waste shops carry it. Brands to look for: Desert Essence, Lucky Teeth, Radius. Always check the coating ingredient.
Q: Can children use beeswax dental floss?
A: Yes — beeswax is food-safe and ideal for children's floss.