Your nonstick pan has a problem that manufacturers haven't been eager to advertise. The coating that keeps your eggs from sticking to the bottom is made of what scientists call "forever chemicals" because they don't break down in your body or the environment. Once they accumulate in your bloodstream, they stay there.
The research on PFAS exposure has been quietly building for years, and what it shows has prompted action: Minnesota banned the sale of PFAS-coated cookware starting January 1, 2025, and Vermont, Connecticut, Rhode Island, and Colorado have announced restrictions of their own. This article covers what you need to know about where PFAS hides in your kitchen, what the health research shows, and which cookware swaps actually reduce your exposure.
What PFAS are and why they persist
PFAS stands for per- and polyfluoroalkyl substances, a family of thousands of synthetic chemicals widely used since the 1940s in applications that need to resist heat, grease, or water. The "forever" label comes from their stability: the carbon-fluorine bonds that make PFAS useful in products are extremely strong and don't break down through normal environmental processes like sunlight, bacteria, or standard water treatment.
Once PFAS enters your body, whether through food, water, or air, it accumulates in your blood, liver, and organs. Your body doesn't metabolize or excrete these chemicals efficiently. A 2019 study examining National Health and Nutrition Examination Survey data found that consuming food prepared at home—with less exposure to PFAS-containing food-contact materials—was associated with lower serum PFAS levels, while restaurant meals and certain packaged foods showed the opposite effect.2
The persistence is the core concern. We've been using PFAS chemicals for decades, and they've accumulated in drinking water, soil, and human blood worldwide. The EPA didn't establish drinking water standards for PFAS until April 2024.
PFAS in nonstick cookware: PTFE and what happens at high heat
Nonstick cookware typically uses a coating called PTFE, most commonly known by the DuPont brand name Teflon. PTFE itself is not PFOA (perfluorooctanoic acid), but PFOA has been used in the manufacturing process, and PFAS can be released during the coating's lifespan. At normal cooking temperatures, PTFE-coated cookware releases various gases and other chemicals that present toxicity concerns according to a 2017 review in the journal Toxicology Reports.1
The risk accelerates at high heat. When nonstick cookware is heated above 500 degrees Fahrenheit—which happens on high burners or in preheated ovens—the coating breaks down more rapidly. Scratched or damaged nonstick pans release particles and gases at normal temperatures too. If the coating is chipped or worn, you're not just getting PTFE particles in your food; you're also potentially increasing PFAS migration into whatever you're cooking.
One honest downside of this concern: the research on human toxicity from PTFE ingestion is limited. The studies that do exist mostly focus on occupational exposure in manufacturing environments or on animals. However, the presence of PFAS in the product is documented, and the accumulation of PFAS in the human body is well-established.
PFAS in food packaging and your regular meals
If you've never owned nonstick cookware, you've almost certainly still been exposed to PFAS through food packaging. Greaseproof and water-resistant coatings on food-contact paper—microwave popcorn bags, fast-food wrappers, pizza boxes, takeout containers—have historically contained PFAS compounds. These chemicals migrate from the packaging into the food, especially when the package is heated.
In a 2023 review of microwave popcorn bags from multiple manufacturers, all samples tested positive for one or more PFAS compounds. People who ate microwave popcorn every day over the course of a year showed PFAS serum levels that were up to 63 percent higher than average, according to the National Health and Nutrition Examination Survey analysis cited earlier.2
The good news: in February 2024, the FDA announced that major food packaging manufacturers had voluntarily phased out the use of PFAS grease-proofing chemicals in new packaging sold to US consumers. The transition is complete for most major brands, so new microwave popcorn bags and food wrappers should no longer contain intentionally added PFAS. However, legacy inventory and international products may still contain them, so checking manufacturer claims where possible can help you identify older stock.
Health effects linked to PFAS exposure
The health associations with PFAS have accumulated steadily over the past decade. A 2023 study published in eBioMedicine examined PFAS exposure in people with and without thyroid cancer diagnoses. The researchers found that each doubling in blood levels of PFOS (perfluorooctane sulfonic acid, one of the most common PFAS) was associated with a 56 percent increase in thyroid cancer diagnosis.3 The finding is significant, though it's worth noting this was a case-control study, not a proof of causation.
Beyond cancer associations, research has linked PFAS exposure to liver damage, thyroid dysfunction, immune system suppression, reduced fertility in women, high blood pressure, and developmental effects in children. The International Agency for Research on Cancer recently classified PFOA as "carcinogenic to humans" (Group 1) and PFOS as "possibly carcinogenic" (Group 2B).
A limitation here: much of the research on PFAS health effects comes from occupational exposure studies, animal studies, or epidemiological associations that don't establish direct causation. The research base is stronger for some outcomes (thyroid function, immune effects) than others. But the consistency across different study types and populations suggests the associations are real, even if the mechanism isn't completely understood.
Understanding PTFE vs. PFOA and GenX replacements
Many people conflate PTFE and PFOA, assuming they're the same thing. They're not, and the distinction matters. PTFE is the coating material itself. PFOA was used as a processing chemical in manufacturing that coating. DuPont phased out PFOA in manufacturing by 2013, but the shift created a new problem: replacement chemicals.
GenX is the trade name for HFPO-DA (hexafluoropropylene oxide dimer acid), a chemical designed to replace PFOA in the manufacturing process. It was promoted as a safer alternative because it was shorter-chain and broke down more easily than PFOA. However, new research suggests GenX may have similar or even greater toxicity to the chemical it replaced, affecting the liver, reproductive system, and endocrine function. GenX is now on the EU's list of substances of very high concern. Some newer nonstick cookware brands claim to use GenX or other replacement PFAS instead of PFOA, but these replacements still accumulate in the body like their predecessors.
Cookware materials that don't contain PFAS
The good news: there are straightforward alternatives that perform well and don't require PFAS coatings.
Stainless steel requires a bit of oil or butter to prevent sticking, but it's durable, heats evenly, and lasts decades. It can't leach PFAS. The downside is the learning curve if you're used to nonstick and expect food to slide around effortlessly.
Cast iron is naturally nonstick once seasoned and can last for generations. It performs exceptionally well at high heat and can move from stovetop to oven. The maintenance is minimal, though the initial cost is low and it actually improves with use as the seasoning builds. One caveat: cast iron is heavier and requires a bit of care to prevent rust if you don't maintain the seasoning.
Carbon steel sits between cast iron and stainless steel in terms of seasoning needs and performance. It's lighter than cast iron, heats faster, and develops a natural nonstick surface with use. Like cast iron, it requires regular seasoning and careful storage.
Ceramic-coated cookware uses a glassy ceramic coating instead of PTFE. True ceramic (not ceramic-coated metal) doesn't contain PFAS. The downside: ceramic-coated pans are generally less durable than uncoated metal, and the coating can wear or chip if you use metal utensils or expose it to rapid temperature changes. However, they're a reasonable transition option if you want something closer to nonstick without PFAS.
Reducing PFAS exposure beyond cookware
Since PFAS is now widespread in the environment and accumulates in the body, eliminating all exposure is not realistic. The practical approach is to reduce unnecessary exposure.
Preparing more food at home reduces exposure to PFAS in restaurant food packaging. When you do buy packaged foods, look for manufacturers that have explicitly removed PFAS from their packaging—many major food companies now certify this. Filter your drinking water if you're in an area with known PFAS contamination; activated carbon and reverse osmosis filters both reduce PFAS levels. Avoid microwave popcorn and fast food packaging when you can, though the FDA phase-out of intentionally added PFAS in food packaging has reduced this risk going forward.
Store food in glass or stainless steel containers instead of plastic whenever possible. Avoid non-stick cookware, especially damaged or older nonstick pans. If you already own nonstick cookware, replace it when it shows wear rather than waiting until it falls apart.
The regulatory shift and what it means
The EPA's 2024 drinking water standards for PFAS represent the first federal action to regulate these chemicals in water supplies. The standards set safe levels for PFOA, PFOS, and four other PFAS compounds. Public water systems have until 2027 to test for PFAS and must notify the public of their findings.
State-level restrictions on cookware are accelerating. Minnesota's ban takes effect immediately; Vermont's takes effect in 2025; Connecticut, Rhode Island, and Colorado's take effect between 2026 and 2028. These restrictions apply to cookware sold with intentionally added PFAS coatings, not to ceramics or uncoated metals.
The bottom line
PFAS accumulation in human blood is well-documented and rising in some populations. Health associations with thyroid function, immune suppression, and cancer risk are strengthening. Nonstick cookware and certain food packaging are significant sources of exposure, though the packaging exposure is declining due to the FDA phase-out. Replacement PFAS chemicals like GenX don't appear to be meaningfully safer alternatives. Uncoated cookware materials—stainless steel, cast iron, carbon steel—eliminate this source of exposure with minimal lifestyle trade-off. The shift toward PFAS-free cookware is becoming the default in most US states and will likely be the norm within a few years. Swapping your cookware now gets ahead of the transition and reduces your personal PFAS burden going forward. See our related articles on identifying greenwashing claims and choosing food storage materials for more practical reduction strategies.