Coumarin

This aromatic compound occurs naturally in many plants or gets produced synthetically, known for its sweet hay-tonka aroma. It's used as a fragrance note and labeling allergen in perfumed products, carrying sensitization risk for some users.
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Ingredient Snapshot

Overview
A sweet, hay-like fragrance ingredient with no real skincare benefit.
Category
Fragrance
Type
Fragrance

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

Imparts a sweet, comforting scent to improve the sensory experience; it has no established skincare efficacy. Evidence for skin benefits is limited, and it may bother sensitive individuals.

Uses In Skincare & Cosmetics

Frequently used in fine fragrances, scented lotions, and body washes to round out and sweeten perfume profiles.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Recognized as a fragrance allergen with irritation/sensitization potential; patch testing is prudent for sensitive skin. In the EU, it must be listed on labels above low thresholds (0.001% leave‑on, 0.01% rinse‑off).

Is Coumarin a Good Ingredient?

Adds scent only and lacks demonstrated skincare efficacy; known as a fragrance allergen with a meaningful risk of sensitization in susceptible users. Those gaps in the evidence, plus the added risk, are why it sits at Fair.

Products with Coumarin

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