What do the Clean, Low, Watch and Swap levels mean?

They are cut from a continuous concern level the app computes from the sourced claims that the chosen evidence lens shows: each claim counts its concern class, tier weight, confidence and dose relevance, combined worst-first with a decay so one serious finding outweighs many small ones, then scaled by how much of the substance reaches you in this use. Clean is below 0.35, Low below 1.1, Watch below 2.0 and Swap above that, on a 0 to 3 scale.

Is Polytetrafluoroethylene safe in heated food packaging?

Q: Is polytetrafluoroethylene safe in heated food packaging?

Under the app's default Cautious lens, polytetrafluoroethylene in heated food packaging rates Watch: worth watching; the app would list a cleaner alternative type. 1 sourced concern counts (oxidation by-products, consensus tier). This is research with sources, not medical advice.

Materials & packaging1 use researched1 sourced claims

Where it turns up: non-stick coating for cookware. Detox My Life researched polytetrafluoroethylene under one use, because the same substance means something different in each use. Every claim below carries its evidence tier, how sure the research is that it applies here, and the sources it cites. The level is computed by the app's own deterministic engine, so the page says exactly what the app would.

Level by use and lens

Use	Mainstream	Cautious (default)	Based	Concerns · favour · fringe
Heated with food in it	Watch	Watch	Watch	1 · 0

Mainstream shows consensus claims only; Cautious adds emerging research; Based adds fringe claims, labelled as such. The last column counts, under Cautious, the sourced concerns, the findings in its favour and the fringe claims Based would add.

Safer swaps: the app's swap catalog covers the products this turns up in: Non-stick pan. Alternatives are always types, never brands.

Heated with food in it Watch

Under the default Cautious lens polytetrafluoroethylene in heated food packaging rates Watch: worth watching; the app would list a cleaner alternative type. Mainstream (consensus only) rates it Watch; Based (adds the fringe) rates it Watch. Researched 2026-09-03.

Sourced concerns (1)

ConsensusOxidation by-productsconfidence 100%

When heated above approximately 260°C (500°F), PTFE coatings can degrade and release toxic fumes and ultrafine particles, which can cause flu-like symptoms in humans, known as polymer fume fever.

Why here: This applies directly to heated food contact materials like nonstick cookware, where overheating can occur, especially with empty pans or high heat settings.
What would have to be true: Inhalation of fumes released from PTFE-coated cookware heated above 260°C (500°F). Symptoms typically appear 4-10 hours after exposure and resolve within 12-48 hours.
The other side: PTFE is stable and safe at normal cooking temperatures (below 260°C/500°F), and accidental ingestion of PTFE itself is not considered harmful as it is inert and not absorbed by the body.

Sources the engine cites:

Protect yourself from teflon flu — poison.org · regulator or public body
5 web articles (letshomebody.com, asaicookware.com, healthline.com, …), linked in the app.

Not researched here

The engine has no dossier for polytetrafluoroethylene when cooked with heat, in cold food, as a finishing ingredient, in food and drink or other uses. The app researches an ingredient for the use it infers from your product, so a scan fills these in; this page only shows what has already been researched and source-verified.

This is research, not medical advice. Detox My Life shows sourced claims sorted by evidence tier. It does not diagnose, treat, or tell you to start or stop anything. Talk to a qualified professional about your health.

Scan your own. The app reads any product label with your camera, works out how you are about to use it, and researches every ingredient for that use with live sources. Every scan adds to a Detox Score for your home, where 50 is a typical home in your region, and a plan of next swaps.

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