Snapshot
- Overview
- A sweet, hay-like fragrance ingredient with no real skincare benefit.
- Category
- Fragrance
- Type
- Fragrance
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.
Like this ingredient?
Our take
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.
What it does
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.
Where you'll find it
Uses in Skincare & Cosmetics
Frequently used in fine fragrances, scented lotions, and body washes to round out and sweeten perfume profiles.
Before you use it
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).
Products with Coumarin
