No air fryer directly causes cancer, but the materials inside some models and the way you cook with them can expose you to chemicals linked to cancer risk. The two concerns are the non-stick coatings on the basket (which can release harmful compounds) and acrylamide, a chemical that forms naturally in starchy foods cooked at high temperatures. Choosing the right air fryer and adjusting how you cook can minimize both.
The Real Cancer Concern: Coatings, Not the Appliance
Most mainstream air fryers use non-stick baskets coated with PTFE (the chemical behind the Teflon brand name). Manufacturing PTFE historically involved PFOA, a “forever chemical” that the International Agency for Research on Cancer now classifies as carcinogenic to humans (Group 1), the agency’s highest category. Reviews of the evidence show a strong association between PFAS exposure and testicular and kidney cancer. While most manufacturers have phased out PFOA itself, PTFE coatings can still release other potentially harmful compounds called perfluoroalkyl carboxylic acids when heated above 300°C (572°F), a temperature some air fryers can reach.
Inhaling fumes from overheated PTFE coatings can cause flu-like symptoms: headache, fever, chills, and body aches. Over time, coatings also degrade through normal wear and tear, and small particles or chemicals can transfer to food. A quick look at product disclosures confirms the issue. The popular Ninja 4-quart air fryer, for example, states plainly: “This product contains Polytetrafluoroethylene (PTFE).” PFAS chemicals are now on California’s Proposition 65 list of substances known to cause cancer.
Safer Materials to Look For
If your goal is to avoid these coatings entirely, three types of air fryer construction stand out:
- Stainless steel baskets and racks. These have no coating at all. There’s nothing to flake, degrade, or release fumes. For people who want the simplest, most transparent material, stainless steel is the most straightforward option. The tradeoff is that food sticks more easily, so you may need to lightly oil the basket or use parchment liners.
- Glass bowl air fryers. These use thick, heat-resistant glass as the cooking chamber, similar to standard oven bakeware. There’s no hidden coating on the interior, and you can visually inspect the surface yourself. They also let you watch food as it cooks.
- Ceramic-coated baskets. Some manufacturers market ceramic-coated baskets as PFAS-free and PFOA-free, which is an improvement over traditional Teflon. However, “ceramic coating” is still a coating. It can wear down over time, especially with abrasive cleaning, and some ceramic coatings use proprietary formulations that aren’t fully disclosed. If you go this route, look for explicit “PFAS-free” and “PTFE-free” labeling, not vague marketing terms like “eco coating” or “healthy coating.”
When shopping, check for clear material disclosures on the product page. A trustworthy label will specifically state “PFAS-free” and “PTFE-free” together, not just one. Avoid products that dodge the question with ambiguous language.
Acrylamide: A Risk From Cooking, Not the Fryer
The other cancer-related concern with air fryers has nothing to do with the appliance itself. Acrylamide forms naturally when starchy foods like potatoes, bread, and root vegetables are cooked above 120°C (about 250°F) in low-moisture conditions. It’s produced by a reaction between natural sugars and an amino acid called asparagine. This happens in ovens, deep fryers, toasters, and air fryers alike.
Here’s what may surprise you: air frying doesn’t necessarily produce less acrylamide than other methods. A study published in Frontiers in Nutrition found that air-fried potatoes actually had the highest acrylamide content at 12.19 μg/kg, compared to 8.94 μg/kg for deep-fried potatoes and 7.43 μg/kg for oven-fried potatoes. The concentrated heat and low humidity inside an air fryer create conditions that are efficient at producing acrylamide. This doesn’t mean air fryers are dangerous, but the popular belief that air frying is automatically healthier in every way doesn’t hold up on this measure.
The FDA has not set any maximum recommended level for acrylamide in food, though it does recommend that manufacturers be aware of acrylamide levels in their products and explore reduction techniques.
How to Reduce Acrylamide When Air Frying
You can significantly cut acrylamide formation with a few simple prep steps. The most effective is soaking sliced potatoes in water before cooking. Soaking draws out the free sugars that fuel acrylamide production. Even a 15 to 30 minute soak in cold water makes a difference; longer soaking (one to two hours) removes more. Rinse and pat dry before cooking.
Blanching, briefly boiling potato pieces for a few minutes before air frying, also reduces acrylamide precursors, though it can soften texture. Beyond prep, the simplest approach is to cook at lower temperatures for slightly longer and aim for a golden yellow color rather than deep brown. The darker and crispier the surface, the more acrylamide it contains.
These steps apply to any cooking method, not just air frying. If you regularly make fries, roasted potatoes, or toast, the same principles hold in your oven or on your stovetop.
Putting the Risk in Perspective
Air fryers are not uniquely dangerous. The coating concern applies to any non-stick cookware, from frying pans to baking sheets. And acrylamide forms in any high-heat, low-moisture cooking environment. What makes air fryers worth paying attention to is that they combine both factors: a coated basket heated to high temperatures in a small, enclosed space.
If you want to minimize both risks, choose an air fryer with a stainless steel or glass cooking chamber, soak starchy foods before cooking, and aim for lighter browning. That combination addresses the two main pathways through which air fryer use could contribute to chemical exposure. No single appliance brand is inherently cancer-free or cancer-causing. What matters is what the basket is made of and how you use it.