What are PFAS, BPA, phthalates, VOCs, and other chemicals? Plain-English explanations of what they are, where they're found, and why they matter for families.
28 terms
Acrolein is a highly reactive aldehyde (CH2=CHCHO) that forms when cooking oils are heated past their smoke point, especially during high-heat cooking in air fryers and deep fryers. It is a potent respiratory irritant with emerging links to cardiovascular disease and lung damage -- and it can accumulate to concerning levels in poorly ventilated kitchens.
A naturally occurring chemical that forms when starchy foods are cooked at high temperatures (above 120 degrees C / 248 degrees F) through the Maillard browning reaction. It appears in air-fried, baked, roasted, and fried foods - most heavily in potatoes and grains. Classified by IARC as a probable human carcinogen (Group 2A), it is manageable with simple cooking adjustments.
Harmful compounds that form naturally when proteins or fats react with sugars during high-heat cooking. Air frying, grilling, and roasting at elevated temperatures produce the highest levels. Linked to inflammation, diabetes, and cardiovascular disease. Manageable through cooking technique adjustments.
A synthetic estrogen-mimicking chemical used since the 1950s to harden polycarbonate plastics and line metal food and beverage cans. BPA leaches into food and drinks, disrupts hormone signaling even at low doses, and is linked to reproductive harm, childhood obesity, cardiovascular disease, and neurodevelopmental delays. It is now banned from baby bottles and sippy cups in the US, Canada, and the EU -- but it persists in canned food linings, thermal receipts, water bottles, and food storage containers worldwide.
A common replacement for BPA found in thermal receipt paper, plastics, and food containers. BPS binds to estrogen receptors at similar potency to BPA and has been detected in 81% of Americans tested. Many products labeled BPA-free contain BPS instead.
A toxic heavy metal classified as a Group 1 carcinogen by IARC. Found in cheap pigments on exterior coatings of budget air fryers, some ceramic glazes, batteries, and cigarette smoke. Cadmium accumulates in the kidneys with a biological half-life of 10-30 years and is listed under both Prop 65 and RoHS.
A fine black powder used as a pigment in dark-colored nonstick coatings, rubber, and plastics. Classified by IARC as Group 2B (possibly carcinogenic when inhaled). Found in dark air fryer basket coatings. Low risk from intact coatings but particles could be released if the coating degrades or flakes.
Synthetic silicon dioxide-based nonstick coatings applied via sol-gel process. Marketed as 'ceramic' nonstick, these coatings are generally PFAS-free but are not traditional ceramic or pottery. Less durable than PTFE coatings but considered a safer alternative for families concerned about fluoropolymers.
Chemical additives mixed into the plastic housings and internal components of kitchen appliances to meet flammability safety standards. Common types include organophosphate flame retardants (OPFRs) and brominated flame retardants (BFRs), both of which can off-gas when heated and are linked to endocrine disruption and neurodevelopmental effects in children.
A synthetic polymer made from silica (sand) that is widely used in kitchen products including air fryer gaskets, baking mats, spatulas, and liners. FDA considers it Generally Recognized as Safe (GRAS) for food contact. Stable at temperatures up to 400-500 degrees F and does not leach BPA, phthalates, or PFAS.
Formaldehyde is a colorless, pungent gas classified as a Group 1 carcinogen by the International Agency for Research on Cancer. It off-gases from adhesives, plastics, and resins in new appliances, furniture, and building materials. In air fryers, formaldehyde is a key component of the 'new appliance smell' and is most concentrated during the first several uses before dissipating with burn-in cycles.
Heterocyclic amines (HAAs) are mutagenic compounds formed when amino acids, sugars, and creatine in muscle meat react at high cooking temperatures -- above roughly 150 degrees C (300 degrees F). They form on the surface of grilled, pan-fried, and broiled meats, and at lower levels in air-fried meat. Four specific HAAs -- IQ, MeIQ, MeIQx, and PhIP -- are classified as known or probable human carcinogens by international agencies.
A toxic form of the element chromium classified as a Group 1 known human carcinogen by IARC. It can leach from low-quality stainless steel cookware and air fryer components at high temperatures. Not to be confused with trivalent chromium (Cr-3), which is an essential nutrient the body needs in trace amounts.
An organic compound used to make hard, heat-resistant plastic (melamine resin). Found in cheap air fryer accessories, dishes, and utensils. Leaches formaldehyde when heated above 160 degrees F (70 degrees C). Not safe for high-heat cooking. Associated with kidney damage and the 2008 Chinese milk contamination scandal.
Microscopic plastic particles smaller than 5mm (microplastics) and smaller than 1 micrometer (nanoplastics) that shed from plastic components when repeatedly heated. Recent studies show heated plastics release millions of micro- and nanoplastic particles per gram. These particles have been found in human blood, placenta, and breast milk, and can carry other chemicals like phthalates and BPA as they leach into food and air.
Silver nanoparticles applied as antimicrobial coatings on some kitchen products, food containers, and appliance accessories. Regulated by the EPA as a pesticide. Long-term health effects are poorly understood, and concerns exist about gut microbiome disruption and environmental persistence.
The migration of nickel from stainless steel cookware and air fryer baskets into food. Nickel is a common allergen affecting 10-20% of the population and is an IARC Group 1 carcinogen via inhalation. Stainless steel (304 grade = 8-10% nickel) leaches at very low levels, especially into acidic and salty foods, with most leaching occurring during the first few uses.
A family of hundreds of chemicals formed when organic matter burns incompletely -- in cooking, primarily when fat drips onto flames or food chars at high heat. Benzo[a]pyrene (BaP), the most studied member, is classified by IARC as a Group 1 carcinogen (definitely causes cancer in humans), and is the compound regulators worldwide use as the benchmark for PAH contamination in food.
A family of 10,000+ synthetic chemicals with an unbreakable carbon-fluorine bond. Found in nonstick cookware, air fryer baskets, food packaging, and drinking water. Called "forever chemicals" because they accumulate in the body and never break down — with links to cancer, immune suppression, and hormone disruption.
PFOA is the specific PFAS compound that coated DuPont's Teflon pans for decades and contaminated drinking water near manufacturing plants. It's now classified as a confirmed human carcinogen (Group 1, WHO/IARC 2023), with the strongest evidence for kidney and testicular cancer. Although PFOA was phased out of US manufacturing by 2015, it persists in the environment, in older cookware, and in the blood of millions of Americans.
A legacy PFAS chemical banned globally under the Stockholm Convention. PFOS was used in Scotchgard, firefighting foam, and industrial coatings. It bioaccumulates in human blood with a half-life of 4-5 years and is detectable in 98% of Americans.
A group of plasticizer chemicals used to make plastics flexible and durable. Found in PVC, vinyl, food packaging, personal care products, and kitchen appliance components. Phthalates are endocrine disruptors that affect testosterone and thyroid hormones, with strong evidence linking them to reproductive harm, particularly in developing boys.
A synthetic fluoropolymer used as the nonstick coating on most cookware and air fryer baskets. PTFE is classified as a PFAS compound. It's chemically inert at normal temperatures, but begins releasing toxic fumes above 500 degrees F - a real concern with high-heat cooking, overheated pans, and families who own pet birds.