The evidence on PFAS in tampons is mixed, and the data is still limited. Testing keeps finding that the absorbent cotton core of most tampons is generally free of PFAS, while traces of fluorine, a marker for PFAS, show up more often in plastic applicators and wrappers. How much, if any, reaches your body is an open question. Evidence strength here is Limited.
Key takeaways
– The tampon’s cotton core is usually PFAS-free. When fluorine turns up, it is most often in the applicator or wrapper, not the part that touches you.
– A 2025 University of Notre Dame study (Wicks and Peaslee) found tampons “in general” did not contain fluorine, and that reusable products like period underwear were the bigger concern.
– Consumer-watchdog testing in 2020 to 2022 found a PFAS indicator in about 22 percent of tampons sampled, versus 65 percent of period underwear.
– Whether PFAS from a tampon actually crosses into your bloodstream has not been measured. Scientists say it is probably not zero, but the amount is unknown.
– If you want to lower exposure, the easy wins are applicator-free or cardboard-applicator tampons and brands that publish PFAS testing.Evidence strength: Limited. The findings come from independent screening studies and consumer testing that detect organic fluorine as a stand-in for PFAS, not from human studies measuring what gets absorbed. No regulator has set a tampon-specific PFAS limit. The signal is real but the dose and the health impact are not yet established.
What PFAS are, and why people ask about tampons
PFAS stands for per- and polyfluoroalkyl substances, a large family of synthetic chemicals nicknamed “forever chemicals” because they break down very slowly. They make things water-resistant, stain-resistant, and slippery, which is why they end up in packaging, cookware coatings, and some textiles.
The tampon worry took off after consumer testing and news stories reported PFAS in period products. That is fair to ask about, because a tampon sits against absorptive tissue. The useful question is not “are forever chemicals scary” but “where in a tampon do they show up, and does any reach me.” The honest answer separates the cotton core from the packaging, and that is where most coverage blurs together.
What the research actually shows
Here is what the testing has and has not found, from the strongest signal to the weakest.
- The cotton core is usually clean. In a 2025 study from the University of Notre Dame, published in Environmental Science and Technology Letters, researchers screened more than 70 menstrual products and reported that tampons “in general” did not contain fluorine. The fluorine they did find clustered in pad wrappers and reusable period underwear, not tampon cores (Notre Dame, 2025).
- When it shows up, it tends to be the applicator. When NYT Wirecutter had 44 period and incontinence products lab-tested, all five tampons showed only very low levels of suspected PFAS, and the fluorine signal came from one tampon’s applicator, not the absorbent part (NYT Wirecutter, 2023).
- Some consumer testing did find an indicator in tampons. Lab analyses commissioned between 2020 and 2022 by the watchdog site Mamavation and Environmental Health News reported a PFAS indicator in about 22 percent of tampons, compared with roughly 48 percent of pads and liners and 65 percent of period underwear (TIME, 2023). This was a fluorine screen, not full chemical confirmation of each compound.
- Broader product screening flags a possible exposure route. A peer-reviewed analysis of personal hygiene products found perfluorinated carboxylic acids made up over 85 percent of the PFAS detected and raised the possibility of a dermal, or skin-contact, exposure pathway worth studying (Zhou et al., 2023, PMID 37262408).
One method note that matters: most of these studies measure organic fluorine, which is a fast stand-in for PFAS, not a count of specific PFAS molecules. A fluorine hit means PFAS is likely present, but it does not by itself tell you which compound or how much.
Where fluorine shows up in a tampon
| Part of the tampon | How often a PFAS marker is found | What it means for you |
|---|---|---|
| Cotton or rayon core (touches you) | Generally none in recent screening | The absorbent part is usually clean |
| Plastic applicator | Sometimes, in some brands | Brief contact, does not stay inside |
| Wrapper or packaging | More common | No body contact at all |
| Reusable alternatives (period underwear) | Most often of all | A separate product category, not tampons |
How exposure actually happens, and the open question
Even when a tampon component carries a PFAS marker, that is not the same as a dose in your body. Two things have to happen: the chemical has to leave the material, and your tissue has to absorb it. Neither has been measured well for tampons.
The vaginal lining is a mucous membrane, more absorptive than ordinary skin, which is why some medicines are delivered that way. So the route is plausible. But the amount of PFAS that might transfer from a tampon has not been quantified. As Pete Myers, a scientist who helped fund some of the testing, put it, the transfer is “unlikely to be nothing,” yet there is very little data to put a number on it. That uncertainty is why our verdict is Mixed and our confidence is Limited. We will not overstate a risk that has not been measured, nor wave away a plausible one.
For perspective: most PFAS exposure in the general population comes from food, drinking water, and food packaging. A tampon, used for part of a few days each month, is a small and intermittent possible contributor next to those daily sources. That is not a reason to ignore it, but it is a reason not to panic.
Who should care most
This is exposure-reduction information, not medical advice. Tampons remain a regulated, widely used product, and nothing here says stop using them.
- People who are pregnant or trying to conceive. PFAS exposure is something this group often chooses to lower across the board, so picking a tested, applicator-free tampon is a reasonable, low-effort step.
- Heavy or daily users. If you use tampons often and for many hours, lowering any avoidable exposure makes more sense than for occasional use.
- Anyone already reducing PFAS elsewhere. If you have switched your water filter or cookware, matching that with a PFAS-tested period product keeps your approach consistent.
- People weighing reusables. Some reusable period underwear has shown the highest fluorine levels, so “reusable” does not automatically mean “lower tox.” Check that a specific product is PFAS-tested.
Safer swaps
If you would rather keep possible PFAS exposure low, these are practical, low-effort options. None of this is urgent.
- Applicator-free or cardboard-applicator organic cotton tampons. Since the applicator is where fluorine most often shows up, skipping the plastic one removes the most common source. Look for GOTS or OEKO-TEX certified organic cotton.
- Brands that publish third-party PFAS testing. A company that shares lab results for fluorine or PFAS is doing the verification for you.
- A PFAS-tested menstrual cup, if you want a reusable. Medical-grade silicone cups avoid the cotton-and-applicator question entirely, but only choose one with published material testing.
Affiliate disclosure: some links above may be affiliate links. We only suggest products that fit the evidence on this page, and a purchase does not change our verdict.
Related questions
- Does dental floss contain PFAS?
- What does PFAS in drinking water mean for me?
- Are PFAS in nonstick cookware a real risk?
- Do period underwear contain PFAS?
FAQ
Do tampons contain PFAS?
Some testing has found a PFAS marker in tampons, but the absorbent cotton core is usually clean. When fluorine, the marker for PFAS, does turn up, it is most often in the plastic applicator or the wrapper rather than the part that touches your body. The overall evidence is mixed and still limited.
Which tampons do not have PFAS?
There is no official certified list, but applicator-free and cardboard-applicator organic cotton tampons remove the part where fluorine most often appears. The most reliable signal is a brand that publishes third-party PFAS or fluorine testing, since the applicator is the usual source rather than the cotton itself.
Do Tampax tampons contain PFAS?
In the 2022 Mamavation and Environmental Health News lab screening, one specific product, Tampax Cardboard Applicator Unscented, was among five tampons that showed a low level of organic fluorine, the marker for PFAS, in the range of 19 to 28 parts per million (EHN, 2022). That is a marker for likely PFAS, not a count of specific compounds, and the testers described these traces as probably not intentionally added. It also does not mean every Tampax product carries the same result, and it does not tell you how much, if any, reaches your body. As always, the cotton core tends to test clean while applicators are the more likely place for a marker, so check the manufacturer’s own published testing for the exact product you use.
Is it still safe to use tampons?
Tampons are regulated and widely used, and no study has measured a confirmed PFAS dose reaching the body from a tampon. The findings so far show a marker in some products, mostly in applicators, not a proven health harm. If you want to lower exposure, choosing a tested, applicator-free product is a simple step.
Can PFAS be absorbed through a tampon?
This has not been measured. The vaginal lining is absorptive, so the route is plausible, and scientists say transfer is probably not zero. But the actual amount that might cross from a tampon into the bloodstream is unknown, which is why the honest answer is uncertainty rather than a firm yes or no.
Written by Luc Dossis, founder of Toxlens. Reviewed 2026-06-10. See how we grade the evidence in our methodology. This is exposure-reduction information, not medical advice.
