Every day, millions of women reach for pads, tampons and panty liners under the basic assumption that products made for our most intimate anatomy are safe, non-toxic and thoroughly tested. Now, a major legal battle is pulling back the curtain on what is really lurking in conventional period care.
Morning Honey reports that a class action lawsuit filed in Los Angeles County Superior Court against Edgewell Personal Care, the manufacturer of Carefree panty liners, alleges that the company failed to disclose that its liners secretly exposed consumers to perfluorooctanoic acid (PFOA). PFOA belongs to a notorious class of synthetic industrial compounds known as per- and polyfluoroalkyl substances (PFAS), or “forever chemicals” – so named because they do not break down naturally in the environment or in human tissue. While Carefree marketed these liners for daily, long-term wear to manage moisture and odor, the complaint argues that the packaging contained zero warnings or disclosures regarding these toxic compounds.
The biological stakes could not be higher. Vaginal and vulvar tissues are uniquely vulnerable to chemical exposure. Unlike the skin on our arms or legs, which is shielded by a thick outer protective barrier (the stratum corneum), intimate mucous membranes are highly permeable and rich in blood vessels. When forever chemicals, synthetic dyes and fragrance compounds come into direct contact with these tissues, they can absorb directly into the bloodstream without first being filtered and processed by the liver. For women wearing panty liners for 8 to 10 hours a day – often over the course of decades – this sustained, direct contact is cause for serious concern.
What we know about the Carefree panty liners lawsuit
The multi-plaintiff lawsuit in California marks a further escalation of legal scrutiny against the parent manufacturer, Edgewell Personal Care, following prior regulatory notices of toxic chemical contamination in the waters.
Hundreds of women banded together to allege in legal filings in Los Angeles County Superior Court that regular and prolonged use of Carefree liners exposed them to high levels of PFOA. Plaintiffs allege they used the products for 10 hours or more each time, thousands of times over the years of regular use. Many of the women listed in the filing have breast cancer, ovarian cancer, kidney cancer, chronic thyroid disease, high cholesterol, severe liver disease and recurrent reproductive infections; others list decreased fertility or continued medical concern about possible future cancers.
The lawsuit also alleges that the manufacturers had inexpensive laboratory testing available that would have readily detected fluorinated compounds and that they had the industrial capabilities to develop safer alternatives. According to the legal complaint, the company was aware in 2024 that independent laboratory testing had identified PFOA in Carefree products; nevertheless, the company continued to market and distribute the liners nationwide. This continuous commercial supply has been happening despite California’s new, tough-on-tightening statutory restrictions on the intentional addition of per- and polyfluorocarbons (PFAS) to certain consumer textiles that took effect on Jan. 1, 2025.
The brand is not the first to be targeted for forever chemicals litigation. In February 2024, Ecological Alliance gave a formal 60-day notice to California’s Attorney General, which eventually led to a lawsuit filed in September 2024 under California’s Proposition 65, a state law that requires businesses to notify consumers of products containing known carcinogens or reproductive toxins. The lawsuit in this case called for court-ordered warning labels, civil penalties and the statewide removal of PFOA from liners.
Why safety is a concern
While the presence of PFOA in personal hygiene products is concerning, the compound is part of a larger family of chemicals called per- and polyfluoroalkyl substances (PFAS), which have been dubbed “forever chemicals” because their carbon-fluorine bonds are so strong that they cannot be broken down in the environment or in living systems.
In the past, IARC, part of the World Health Organization (WHO), classified PFOA as possibly carcinogenic; however, after a thorough re-evaluation in late 2023, it was added to Group 1: Carcinogenic to Humans, the highest risk category, alongside asbestos and benzene.
As part of the parallel regulatory actions, the U.S. Environmental Protection Agency (EPA) determined that there is no safe level of human exposure to PFOA in drinking water because of the potential for PFOA to bioaccumulate in tissues and cause biological toxicity at extremely low concentrations.
It is the exposed perineal anatomy of the female that makes personal hygiene pads particularly hazardous as opposed to external waterproof fabrics. Gynecological research published by the National Institutes of Health (NIH) has shown that the labial skin, vaginal vestibule and perianal tissues are highly permeable and well-vascularized.
Chemicals touching the vaginal and vulvar tissues do not pass through the gastrointestinal tract and the hepatic portal system, and instead enter the systemic circulation. Panty liners are engineered to stick to the vulva, preventing fluids from escaping and trapping heat, sweat and moisture against the vulva, which can further enhance transdermal absorption of synthetic chemicals.
Risks and side effects
Repeated exposure to perfluorinated chemicals through intimate mucosal tissue is not just a localized issue – it creates an unfiltered gateway into the bloodstream. Over months and years, this continuous absorption carries documented systemic health risks, driving chronic inflammation, metabolic dysfunction and hormonal disruption. For Black women, who already navigate elevated rates of chronic inflammatory illnesses and reproductive health inequities, the biological toll of these hidden toxins demands close scrutiny.
Cancer risks, cellular stress and organ damage
When persistent industrial chemicals enter the body, they linger. PFOA is notorious for its multi-year half-life in human tissue, steadily accumulating at a rate that exceeds the capacity of internal detoxification pathways to eliminate it.
According to research documented by the Centers for Disease Control and Prevention (CDC), sustained PFOA exposure in humans correlates with heightened risks of kidney and testicular cancers, alongside emerging clinical links to breast and ovarian malignancies. “The chemical remains in the human body for several years, and continued exposure outstrips cells’ ability to keep pace with detoxification, leading to toxic liver damage, elevated liver enzymes, and long-term cellular inflammation,” B.Sc. Researcher Tunde Rasheed tells Blavty Health.
Within the Black community – where breast cancer mortality rates remain roughly 40% higher than for white women despite similar diagnosis rates – the unregulated presence of carcinogenic chemicals in daily essentials points to an urgent environmental health crisis.
Endocrine disruption and cardiovascular strain
At the molecular level, PFOA is a deceptive disruptor. Because its chemical structure mimics the body’s natural fatty acids, it easily binds to key metabolic receptors and thyroid hormone pathways.
This molecular sabotage hijacks normal endocrine signaling. Over time, that interference can manifest as clinical hypothyroidism, autoimmune conditions like Hashimoto’s thyroiditis and unexplained shifts in metabolism and energy. Furthermore, this disruption regularly triggers spikes in low-density lipoprotein (LDL) or “bad” cholesterol – quietly elevating long-term cardiovascular strain in a demographic already facing disproportionate risks for heart disease.
Chronic infections
Synthetic liners manufactured with fluorinated coatings and plastic backing create an impermeable, non-breathable seal against the vulva. This traps heat and sweat, dismantling the delicate microclimate and acidic pH balance required for a healthy vaginal microbiome. As the Cleveland Clinic highlights, these occlusive materials directly trigger contact dermatitis, chronic burning and recurrent bouts of candidiasis (yeast infections) and bacterial vaginosis (BV).
Who is at high risk from PFOA exposure?
“In girls and women in particular, PFAS exposure has been further associated with delayed puberty onset, as well as increased risk for endometriosis, PCOS and breast cancer, which further supports the adverse effects that PFAS have on the female reproductive system,” says Dr. Marc Siegel, clinical professor of medicine at NYU Langone Medical Center.
Fluorinated compounds are known to be biologically persistent and toxic to reproduction, placing particular patient populations at greater risk of clinical vulnerability to synthetic liners.
The Mayo Clinic states that pregnant people and those planning to become pregnant are at high risk due to PFOA exposure. Scientific research correlates this exposure with pregnancy-induced hypertension, preeclampsia, fetal growth restriction, low birth weight and the transfer of PFCs across the placenta to the fetus.
In addition, reproductive endocrinologists point out that women with unexplained infertility, irregular ovulatory cycles, polycystic ovary syndrome (PCOS) or recurrent early miscarriage should avoid using non-organic synthetic menstrual products because perfluorinated chemicals have been shown to interfere with the natural production of luteal-phase progesterone and disrupt ovarian steroidogenesis.
Furthermore, those who have already been diagnosed with other autoimmune diseases, chronic kidney disease or a family history of hormone-sensitive cancers should be especially cautious against the use of products with suspected PFAS additives to reduce the inflammatory triggers they may be facing, as well as to avoid adding to their existing toxic burden.
Best practices for menstrual and daily hygiene
Every woman who uses panty liners for daily freshness, spotting or light bladder leakage can do so while supporting her pelvic health by using non-toxic, breathable menstrual alternatives and evidence-based personal care practices.
Choose certified non-toxic and organic menstrual products
A review published in the Journal of Materials Science suggests switching from regular synthetic pads to third-party certified organic pads. Find pants, panty liners and pads that are 100% GOTS (Global Organic Textile Standard) certified organic cotton and are specifically stated as chlorine-free, fragrance-free, dye-free, and tested for PFAS and heavy metals.
Reusable, washable panty liners made of untreated organic bamboo, cotton fleece, or medical-grade silicone, and menstrual cups, are safe, chemical-free alternatives that reduce direct contact with plastic adhesives.
When shopping for feminine hygiene products, do not just consider the word “natural” on the front of the box; marketing terms are not always precisely controlled. Look for independent verification seals on the back panel, such as GOTS (Global Organic Textile Standard) or MADE SAFE, which attest that the materials are screened and free from PFAS (forever chemicals), endocrine disruptors, and toxic bleaching agents.
Restore pelvic airflow and vulvar skin health
Dermatologists and gynecologists have been highlighting the fact that for women with chronic irritation, or for those who use liners to absorb everyday vaginal discharge, it is important to understand that it is actually a healthy, self-cleaning process of the cervix and vagina and does not need to be absorbed every day. 100% breathable cotton underwear, or none at all, is worn in bed, which helps keep the perineal area dry and aerated, reducing moisture traps that can lead to fungal overgrowth and contact allergies.
Bottom line
This multi-plaintiff lawsuit against the makers of Carefree panty liners highlights the major health risks posed by forever chemicals allegedly present in everyday menstrual hygiene products. The high vascularity of the vulva makes it particularly susceptible to direct absorption of chemicals into the systemic circulation, and chronic exposure to forever chemicals is associated with chronic inflammation, thyroid disease, kidney and reproductive cancers and fertility issues. To protect their pelvic and systemic health, women should choose certified organic, PFAS-free cotton alternatives and ensure the vulvar skin can breathe on its own, and seek guidance from gynecologists for persistent discharge or pelvic pain.
Frequently Asked Questions
Is Stayfree the same as Carefree?
No, Stayfree and Carefree are distinct product lines, although both are legacy feminine hygiene brands that have historically operated under the same corporate parent, Edgewell Personal Care.
Do gynecologists recommend panty liners?
Gynecologists generally discourage the routine, daily use of synthetic panty liners because non-breathable plastic linings trap heat and moisture against the vulva, creating an environment that promotes contact dermatitis, bacterial vaginosis and recurrent yeast infections.
Citations
Morning Honey. Hundreds of women sue Carefree’s makers, claiming its panty liners exposed them to a cancer-linked chemical: ‘It appeared on no label, ingredient list or package.’ Morning Honey. October 14, 2026. https://www.morninghoney.com/p/hundreds-women-sue-carefree-panty-liners-exposed-cancer-linked-chemical-appeared-no-label-ingredient-list-package
IARC. IARC Monographs evaluate the carcinogenicity of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS). www.iarc.who.int. December 1, 2023. https://www.iarc.who.int/news-events/iarc-monographs-evaluate-the-carcinogenicity-of-perfluorooctanoic-acid-pfoa-and-perfluorooctanesulfonic-acid-pfos/
United States Environmental Protection Agency. Our Current Understanding of the Human Health and Environmental Risks of PFAS. www.epa.gov. November 26, 2024. https://www.epa.gov/pfas/our-current-understanding-human-health-and-environmental-risks-pfas
Graziottin A. Maintaining vulvar, vaginal, and perineal health: Clinical considerations. Women’s Health. 2024;20. doi:10.1177/17455057231223716
CDC. How PFAS Impacts Your Health. Per- and Polyfluoroalkyl Substances (PFAS) and Your Health. July 22, 2025. https://www.atsdr.cdc.gov/pfas/about/health-effects.html
Cleveland Clinic. Vulvar Dermatitis: Causes, Symptoms, Diagnosis & Treatment. Cleveland Clinic. 2026. https://my.clevelandclinic.org/health/diseases/24336-vulvar-dermatitis
Noble D. Health effects of PFAS. Mayo Clinic Press. August 4, 2026. https://mcpress.mayoclinic.org/living-well/health-effects-of-pfas/
Blignaut J, Visser HG, Erasmus E, Schutte-Smith M. Review: sanitary pads—composition, regulation, and ongoing research to address associated challenges. Journal of Materials Science. 2025;60(31):13109-13155. doi:10.1007/s10853-025-11151-7