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.
38 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.
The migration of aluminum from cookware and air fryer baskets into food, especially when cooking acidic foods like tomatoes, citrus, or vinegar. Most dietary aluminum comes from food and water, not cookware. The WHO sets a tolerable weekly intake of 2mg/kg body weight. Risk increases when nonstick coatings are scratched or degraded, exposing the aluminum base.
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.
DEET is the most studied EPA-registered insect repellent active ingredient, effective against mosquitoes and ticks. The CDC reports its efficacy peaks around 50% concentration, and the American Academy of Pediatrics recommends products applied to children contain no more than 30% DEET.
Dioxins are a family of highly toxic chemical byproducts created by processes like chlorine bleaching and burning waste. The most studied, TCDD, is classified by the WHO's cancer agency as a known human carcinogen, and tiny amounts persist in the environment and the food chain.
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.
Heavy metals are naturally occurring toxic elements like lead, arsenic, cadmium, and mercury that can contaminate food, water, and everyday products. They build up in the body over time, and for lead there is no known safe level of exposure.
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.
Oil of Lemon Eucalyptus (OLE), whose active component is PMD, is the only plant-derived repellent the CDC and EPA register as effective. The CDC, EPA, AAP, and EWG all agree it should not be used on children younger than 3 years.
UV-absorbing dye chemicals added to laundry detergents to make fabrics appear whiter and brighter. They work by absorbing invisible ultraviolet light and re-emitting it as visible blue light, creating an optical illusion of brightness. Unlike most detergent ingredients, optical brighteners are designed to stay on fabric after rinsing -- which means they sit against skin all day. For families with infants, eczema-prone children, or anyone with sensitive skin, that persistent contact matters.
Organic cotton is cotton grown without synthetic pesticides, herbicides, or genetically modified seeds. It lowers pesticide exposure and environmental impact, but because metals come from soil, organic does not by itself guarantee a finished product is free of heavy metals or PFAS.
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.