Teflon Flu (Polymer Fume Fever): What Sources Report

A name like “Teflon flu” can be unsettling, especially if you cook with a coated pan or basket every day. We have no lab, and this page isn't medical advice. It tells you what named sources report, and where they stop. For what the FDA says about food, see is PTFE safe?

What do the sources report?

• A 2015 medical review: “Overheating of Teflon(®)-coated cookware is one of the more common mechanisms for exposure.” It says these fevers “generally follow a benign course with spontaneous resolution of symptoms”. It also says they can be serious, “especially in those with significant preexisting cardiorespiratory disease”. We read only the abstract.
• A 2012 case report: a healthy 29-year-old man left a PTFE-coated pan on a lit burner while he napped. He woke about five hours later to a room full of white smoke. Hours later he had a fever, a cough and shortness of breath. His symptoms “completely disappeared” by the third day in hospital.
• A 1987 report: three workers at a stamp company, linked to a PTFE mold-release spray and smoking.
• ABC News, 2024: America's Poison Centers received over 265 suspected cases in 2023. ABC says many were from work, not home.

One case, in an extreme situation, tells you what the illness can look like. It doesn't tell you how often it happens or what normal cooking does.

The reports list symptoms such as fever, shivering, sore throat, shortness of breath, coughing and headaches. These are the sources' words, not a checklist for diagnosing yourself.

What about air fryers?

Here the sources stop.

• No report names an air fryer. A PubMed search found none. That means we didn't find one, not that none exists.
• No measurement. We found nothing that measures fumes from an air fryer or the heat of a coated basket near its heating element. You'll see about 500°F given as the point where PTFE breaks down, but we read no source that measured it.
• Normal cooking is an open question. A 2017 review says PTFE-coated cookware releases various gases and chemicals at normal cooking temperatures. It also says few studies describe PTFE's toxicity “without solid conclusions”. That abstract is about cookware.
• The FDA's page is about food. It says nothing about fumes, damaged coatings or air fryers.

Some air fryers do have PTFE, and many manuals don't say. The Nuwave Bravo XL Pro manual says “This product contains” PTFE. Chefman's California list names it for certain models.

What can I do?

• Find out what you have. How to check your air fryer's coating shows where to look.
• Follow your manual on heat and smoke. Brands' instructions differ.
• Look after the coating. If yours is cracking or peeling, see what brands advise.
• If you keep birds, read air fryers in a home with birds first.
• If you feel unwell after a pan or appliance overheated, ask your doctor.

If you'd rather not have the question at all, air fryers without Teflon lists what each brand says. Without PTFE doesn't mean without a coating.