Toothpaste is where the PFAS conversation gets genuinely confusing, because most toothpaste contains fluoride on purpose. So when someone says "there's fluorine in your toothpaste," they are technically right and also possibly talking about two completely different things. The fluoride that fights cavities is not the same as the fluorinated carbon chains that make up PFAS "forever chemicals." Untangling that is the whole job of this article.
The short version: the strongest independent-testing signal in toothpaste is not PFAS at all, it is heavy metals like lead. PFAS in toothpaste is a fair question to ask, but the evidence is thinner and more nuanced than the scary headline suggests. You can check your drinking water for PFAS with a free ZIP lookup, and toothpaste is worth understanding with the same "what does the testing actually say" lens.
Start here, because it clears up most of the confusion.
Fluoride in toothpaste is usually sodium fluoride or sodium monofluorophosphate. It is a simple, inorganic fluoride ion. Your body and decades of dental research understand it well, and at toothpaste concentrations it is there to strengthen enamel and prevent cavities. It is added deliberately and it is regulated.
PFAS, per- and polyfluoroalkyl substances, are something else: synthetic chains of carbon bonded to fluorine, engineered to repel water and grease, and notorious for not breaking down. The "organic fluorine" that labs measure as a PFAS marker means fluorine bound to carbon, which is the signature of these compounds. Inorganic fluoride does not count as organic fluorine.
This distinction is exactly why credible labs that test for PFAS calculate organic fluorine by subtracting out the free fluoride ion. A toothpaste can be full of cavity-fighting fluoride and still test non-detect for PFAS, because those are different chemicals measured differently. Anyone telling you "fluoride toothpaste means PFAS in your mouth" is conflating two things that the testing keeps separate.
The most-cited PFAS testing of oral-care products comes from Mamavation, working with an EPA-certified lab. The clearest result is on dental floss, not toothpaste: the testing found about 33 percent of dental floss products had indications of PFAS, while about 67 percent did not. Floss is a logical place for PFAS, because the slick, shred-resistant glide of some floss has historically come from PTFE, the same fluoropolymer family as Teflon. (Floss has its own dedicated coverage; this piece is about what goes in the tube.)
For toothpaste specifically, the picture is more reassuring on PFAS. In Mamavation's oral-care testing, toothpaste and tooth-powder products were reported with non-detect results for total organic fluorine at the lab's detection limit of around 10 ppm. In plain terms: the marker for PFAS was not showing up in the toothpaste itself the way it did in some floss. That can change product by product and batch by batch, and the toothpaste data set is smaller than you would want, but as of the available testing, toothpaste is not the standout PFAS offender in your bathroom.
If you came here worried about toothpaste, the better-supported concern is heavy metals. Independent testing led by Tamara Rubin's Lead Safe Mama community-funded lab project has, across roughly 100 toothpaste and tooth-powder products tested through 2024 and 2025, repeatedly found detectable lead, along with arsenic, mercury, and cadmium in some products. One summary of that work reported detectable lead in the large majority of products tested, with only a handful coming back non-detect for all four metals.
A few important caveats so this is not misread. "Detectable" can mean trace amounts, and the relevant question for a product you spit out rather than swallow is dose and how much actually gets absorbed, which the raw chart numbers do not by themselves establish. The American Dental Association and others have noted that small trace levels from naturally occurring sources do not automatically equal a hazard at the amount used and mostly spat out. The flagged sources tend to be natural ingredients that carry mineral contaminants, like bentonite clay, certain botanical powders, and activated charcoal, which is why some "natural" toothpastes test higher for metals than conventional fluoride pastes.
The honest takeaway: the most credible independent-lab concern about toothpaste is heavy metals, especially lead, more than PFAS, and even that is a "worth knowing and choosing carefully" issue rather than a five-alarm emergency. If you want to dig into specific products, Lead Safe Mama publishes its toothpaste chart with the actual non-detect list.
Toothpaste is one square on a much larger board. The full map of where PFAS show up in everyday products puts oral care next to cookware, food packaging, and personal care, so you can see where your attention is best spent. And the exposure with the strongest science and the clearest fix remains PFAS in drinking water, which you can measure right now with the free ZIP lookup and address with a certified filter.
### Does toothpaste contain PFAS? The available independent testing is reassuring on this. Mamavation's EPA-certified-lab testing reported toothpaste and tooth powders as non-detect for total organic fluorine, the PFAS marker, at a roughly 10 ppm detection limit. PFAS showed up far more in dental floss than in toothpaste. The data set is limited, so it is product- and batch-specific, but toothpaste is not the standout PFAS offender in oral care.
### Is the fluoride in toothpaste a PFAS? No. Toothpaste fluoride is usually sodium fluoride or sodium monofluorophosphate, simple inorganic fluoride that strengthens enamel. PFAS are synthetic carbon-fluorine chains, "organic fluorine," engineered to repel water and grease. Labs deliberately subtract out inorganic fluoride when testing for PFAS, because they are different chemicals.
### What is actually the biggest contaminant concern in toothpaste? Heavy metals, especially lead. Lead Safe Mama's community-funded lab testing of roughly 100 toothpaste and tooth-powder products found detectable lead in most of them, with only a handful non-detect for lead, cadmium, mercury, and arsenic. Whether trace levels matter depends on dose and absorption, since you spit toothpaste out, but it is the better-supported concern than PFAS.
### Are natural or charcoal toothpastes safer? Not necessarily. Natural pastes that use bentonite clay, botanical powders, or activated charcoal are the ones most often flagged for mineral contaminants like lead, and charcoal can be abrasive to enamel. "Natural" on the label is not a safety guarantee. Check published third-party testing instead.
### Should I stop using fluoride toothpaste? For PFAS reasons, no, because fluoride is not PFAS and the cavity-prevention benefit of fluoride toothpaste is strongly established. Any decision about fluoride should be made with your dentist based on your cavity risk, not based on confusing fluoride with forever chemicals.
### How do I lower PFAS exposure from oral-care products? Focus on floss before toothpaste. About a third of dental floss products tested by Mamavation showed PFAS indications, often from PTFE coatings, so switching to a non-PTFE floss is the most effective oral-care swap. Toothpaste itself has generally tested non-detect for PFAS in available testing.
Next step: if heavy metals are your concern, look up your toothpaste on Lead Safe Mama's published chart to see whether it tested non-detect, and keep your fluoride toothpaste unless your dentist advises otherwise. The bigger PFAS lever in your bathroom is your floss, not your toothpaste.