Is cinnamal safe on skin (left on)?

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

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 Cinnamal safe on skin (rinsed off)?

Q: Is cinnamal safe on skin (rinsed off)?

Under the app's default Cautious lens, cinnamal on skin (rinsed off) rates Low: a little concern, nothing the app would ask you to swap. 1 sourced concern counts (irritant · allergen, consensus tier). This is research with sources, not medical advice.

Personal care2 uses researched2 sourced claims

Where it turns up: spicy, cinnamon-like scent. Detox My Life researched cinnamal 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, rinsed off	Low	Low	Low	1 · 0
On skin, left on	Low	Low	Low	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: Perfume or cologne. Alternatives are always types, never brands.

On skin, rinsed off Low

Under the default Cautious lens cinnamal on skin (rinsed off) 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)

ConsensusIrritant · allergenconfidence 100%

Cinnamal is a common fragrance allergen that can cause allergic contact dermatitis in sensitized individuals when present in rinse-off cosmetic products.

Why here: Despite the reduced contact time, cinnamal in rinse-off products can still induce skin sensitization and elicit allergic reactions in individuals who are already sensitized.
What would have to be true: The European Cosmetics Regulation mandates labeling of cinnamal when its concentration exceeds 0.01% in rinse-off products, reflecting its potential for sensitization even at low levels.

Sources the engine cites:

The Skin Sensitisation of Cosmetic Ingredients: Review of Actual Regulatory Status - PMC — nih.gov (2021) · regulator or public body
Contact Allergy: A Review of Current Problems from a Clinical Perspective - PMC — nih.gov (2018) · regulator or public body
Contact-Allergic Reactions to Cosmetics - PMC — nih.gov (2010) · regulator or public body
CINNAMAL – Ingredient - COSMILE Europe — cosmileeurope.eu (2026) · review
3 web articles (getcurex.com, cosmeticsandtoiletries.com, dermatologytimes.com), linked in the app.
2 community or commercial pages, not counted here.

On skin, left on Low

Under the default Cautious lens cinnamal 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)

ConsensusIrritant · allergenconfidence 50%

Cinnamal is a known human skin sensitizer and allergen, restricted in cosmetics by the EU, requiring labeling above 0.001% in leave-on products due to its potential to cause allergic contact dermatitis.

Why here: Cinnamal is widely used as a fragrance ingredient in leave-on cosmetic products such as lotions, creams, and perfumes, leading to direct and prolonged skin contact.
What would have to be true: Allergic reactions can occur in sensitized individuals at concentrations above 0.001% in leave-on products.

Sources the engine cites:

Allergic potential & molecular mechanism of skin sensitization of cinnamaldehyde under environmental UVB exposure - PubMed — nih.gov (2024) · regulator or public body
6 web articles (cosmileeurope.eu, skinsafeproducts.com, oxfordbiosciences.com, …), linked in the app.

Not researched here

The engine has no dossier for cinnamal 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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