Flossing is crucial for oral hygiene, helping to remove plaque and food particles from between teeth. However, research has revealed that some dental floss brands contain per- and polyfluoroalkyl substances (PFAS), also known as “forever chemicals.” These synthetic chemicals, commonly used in nonstick cookware and water-resistant clothing, have been linked to serious health concerns. Their presence in floss raises questions about potential risks and what consumers can do to protect themselves.
PFAS have been in use since the 1940s and are known for their resistance to water, grease, and stains. This same resistance makes them persistent in the environment and the human body. Studies have linked PFAS exposure to increased cholesterol levels, immune system suppression, hormonal disruptions, kidney and testicular cancers, pregnancy complications, and liver damage (Agency for Toxic Substances and Disease Registry [ATSDR], 2021). Because these chemicals do not break down easily, they accumulate in the body over time, meaning even low levels of continuous exposure can contribute to health problems
(U.S. Environmental Protection Agency [EPA], 2023).
Some floss brands use PFAS to create a slick, nonstick coating that helps the floss glide between teeth without shredding. While this improves comfort, it also introduces potential health risks. A 2019 study published in The Journal of Exposure Science & Environmental Epidemiology found that women who used PFAS coated floss had higher blood serum levels of these chemicals, suggesting absorption into the body (Boronow et al., 2019). PFAS coated floss also contributes to environmental contamination, releasing chemicals into landfills and wastewater (EPA, 2023).
Identifying which floss brands contain PFAS can be difficult since manufacturers are not always transparent about their ingredients. However, certain brands, including Oral-B Glide, Crest Glide, and Colgate Total Dental Floss, have been flagged for potential PFAS
content due to their use of PTFE coatings (Consumer Reports, 2022). Some private-label brands marketed as “glide” or “comfort” floss may also contain these chemicals. Since there is no government-mandated testing or labeling requirement for PFAS in dental floss, consumers face challenges in making informed choices (Environmental Working Group [EWG], 2023).
For those looking to avoid PFAS, safer alternatives are available. Silk floss, made from natural silk fibers and often coated with beeswax, is biodegradable and PFAS-free. Charcoal-infused floss, such as Cocofloss and Dr. Tung’s Smart Floss, uses plant-based
waxes instead of synthetic coatings. Bamboo fiber floss is also an eco-friendly, PFAS-free option. Checking labels for “PFAS-free” or “PTFE-free” can help consumers make safer choices (EWG, 2023). Additional safer options are listed in our video below, so be sure
to take a look.
The growing concern over PFAS in consumer products highlights the need for greater regulation and transparency from manufacturers. While the EPA and the Food and Drug
Administration (FDA) have taken steps to address PFAS contamination in food and water, regulations for these chemicals in personal care products remain limited (EPA, 2023). Advocacy groups continue to push for stricter policies, including mandatory PFAS testing and disclosure on product labels. Until stronger regulations are in place, consumers can protect themselves by choosing safer alternatives and supporting brands that prioritize
health and sustainability.
The presence of PFAS in some floss brands underscores the widespread nature of these harmful chemicals. While flossing is vital for oral health, it should not come at the cost of long-term risks. By being mindful of product ingredients and opting for PFAS-free alternatives, consumers can reduce exposure to these dangerous chemicals while contributing to a cleaner, healthier environment.
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