Is iron oxide black (ci 77499) safe in food and drink?

Under the app's default Cautious lens (consensus plus emerging evidence), the engine shows no sourced concern for iron oxide black (ci 77499) in food and drink; it rates Clean. 1 finding count in its favour. 1 fringe claim appear only in the Based lens.

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 Iron Oxide Black (ci 77499) safe on skin (left on)?

Q: Is iron oxide black (ci 77499) safe on skin (left on)?

Under the app's default Cautious lens, iron oxide black (ci 77499) on skin (left on) rates Low: a little concern, nothing the app would ask you to swap. 1 sourced concern counts (theory, consensus tier). This is research with sources, not medical advice.

Cosmetics2 uses researched3 sourced claims

Where it turns up: black pigment, cosmetic colorant, common. Detox My Life researched iron oxide black (ci 77499) under 2 different uses, because the same substance means something different in each. 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
On skin, left on	Low	Low	Low	1 · 0
Eaten or drunk	Clean	Clean	Clean	0 · 1 · +1

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.

On skin, left on Low

Under the default Cautious lens iron oxide black (ci 77499) on skin (left on) rates Low: a little concern, nothing the app would ask you to swap. Mainstream (consensus only) rates it Low; Based (adds the fringe) rates it Low. Researched 2026-09-03.

Sourced concerns (1)

ConsensusTheoryconfidence 100%

Iron oxide black (CI 77499) is approved as a safe color additive for cosmetics, including products applied to the eye area, by the U.S. FDA and is permitted in the European Union's Cosmetics Regulation (1223/2009) without restriction when purity requirements are fulfilled.

Why here: This directly addresses the safety for dermal leave-on cosmetic applications.
What would have to be true: Dermal application of cosmetic products containing CI 77499.

Sources the engine cites:

Black Iron Oxide CI 77499 E172 (i) - Review — tiiips.com (2026) · review
1 web article (elchemy.com), linked in the app.

Eaten or drunk Clean

Under the default Cautious lens iron oxide black (ci 77499) in food and drink rates Clean: nothing the lens shows adds concern. Mainstream (consensus only) rates it Clean; Based (adds the fringe) rates it Clean. Researched 2026-09-03.

No sourced concern in the Cautious lens.

In its favour (1)

ConsensusClearedconfidence 80%

Iron oxide black (CI 77499), also known as E172, is widely approved as a food additive and colorant by regulatory bodies such as the FDA, EFSA, and JECFA, and is generally considered safe for ingestion within specified limits.

Why here: It is explicitly approved and used as a food coloring agent.
What would have to be true: Ingestion as a food additive, with an Acceptable Daily Intake (ADI) of 0-0.5 mg/kg body weight established by JECFA, and EFSA guidelines of 0.5 mg/kg body weight per day. The FDA limits elemental iron from ingested drugs to 5 mg/day.

Sources the engine cites:

Iron Oxides - International Association of Color Manufacturers — iacmcolor.org (2026) · review
3 web articles (oasishealth.app, proe.info, …), linked in the app.

Shown only in the Based lens (1)

Fringe claims: hypotheses and commentary that are not scientific consensus, each shown with the other side.

Fringe · not consensusEndocrineconfidence 30%

Some commentators believe that iron oxide black (E172) may contain undisclosed aluminum contamination, which is hypothesized to influence female sex hormones and promote dementias such as Alzheimer's and Parkinson's disease. This is not scientific consensus.

Why here: This concern is directly related to the composition of the food additive and its potential effects upon ingestion.
What would have to be true: Ingestion of food products containing E172 with potential aluminum contamination.
The other side: Regulatory bodies like the EU have stringent purity requirements for food additives, including heavy metal limits. Modern manufacturing processes for E172 involve purification steps to achieve high heavy metal purity thresholds (e.g., 99.8% heavy metal purity required by EU Commission Regulation (EU) No 231/2012). Official toxicological assessments by EFSA and JECFA do not highlight aluminum contamination as a primary concern for E172 safety.

Sources the engine cites (no regulator, review or study among them):

1 community or commercial page, not counted here.

Not researched here

The engine has no dossier for iron oxide black (ci 77499) 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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