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 Furan safe in food and drink?

Q: Is furan safe in food and drink?

Under the app's default Cautious lens, furan in food and drink rates Swap: the app would put this near the top of your swap plan. 2 sourced concerns count (suspected carcinogen, consensus tier; metabolic, consensus tier). This is research with sources, not medical advice.

Food processing1 use researched2 sourced claims

Where it turns up: heat processing of canned foods. Detox My Life researched furan 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
Eaten or drunk	Swap	Swap	Swap	2 · 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 has no entry tied to this ingredient yet. When you scan a product that contains it, the app suggests cleaner alternative types for that product; the swap categories list what the catalog covers today.

Eaten or drunk Swap

Under the default Cautious lens furan in food and drink rates Swap: the app would put this near the top of your swap plan. Mainstream (consensus only) rates it Swap; Based (adds the fringe) rates it Swap. Researched 2026-09-03.

Sourced concerns (2)

ConsensusSuspected carcinogenconfidence 90%

Furan is classified as possibly carcinogenic to humans (Group 2B) by the International Agency for Research on Cancer (IARC) and as reasonably anticipated to be a human carcinogen by the National Toxicology Program (NTP), based on sufficient evidence of carcinogenicity in experimental animals after oral exposure.

Why here: Furan is a chemical contaminant that forms in a wide range of foods during thermal processing techniques such as cooking, roasting, baking, and canning, and is subsequently ingested.
What would have to be true: Dietary intake of furan occurs from various heat-treated foods, including roasted coffee, canned/jarred vegetables and meat, cereals, and jarred foods for infants. Average daily intake for adults is estimated to be around 0.26-0.31 µg/kg body weight/day, with high consumers reaching 0.47-0.72 µg/kg body weight/day. Infants are a particularly exposed group, with an average intake of 0.18 µg/kg body weight/day and high consumption at 0.49 µg/kg body weight/day.

Sources the engine cites:

Furan - Information - AGES — ages.at (2025) · regulator or public body
Toxicity and carcinogenicity of furan in human diet - PubMed — nih.gov (2010) · regulator or public body
Risks for public health related to the presence of furan and methylfurans in food - PMC - NIH — nih.gov (2022) · regulator or public body
Furan Acute Exposure Guideline Levels - NCBI — nih.gov (2005) · regulator or public body
2 community or commercial pages, not counted here.

ConsensusMetabolicconfidence 90%

The European Food Safety Authority (EFSA) concluded that consumer exposure to furan and methylfurans in food could lead to possible long-term liver damage and liver cancer, based on animal studies.

Why here: Furan and related methylfurans are process contaminants that naturally form during the thermal treatment of food, including cooking, canning, and roasting, leading to dietary exposure.
What would have to be true: Dietary exposure to furan and methylfurans occurs from various heat-treated foods, with infants being a particularly exposed group through ready-to-eat jarred or canned foods. Exposure in other population groups is mainly from consumption of grain-based foods and coffee.

Sources the engine cites:

Furan - Information - AGES — ages.at (2025) · regulator or public body
Furan in food – EFSA confirms health concerns — europa.eu (2017) · regulator or public body

Not researched here

The engine has no dossier for furan when cooked with heat, in cold food, as a finishing ingredient, in heated food packaging 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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