Ingredient guide · C

Coumarin

Coumarin is a naturally occurring fragrant compound that gives many plants their sweet, hay-like or vanilla scent. In UK beauty products it is mainly used as a scent ingredient in perfumes, body lotions, shower gels and haircare to add a warm, comforting aroma. It is considered safe at the low levels used in cosmetics.

Coumarin — Coumarin is naturally found in many plants including tonka beans, sweet clover, lavende… | UK Lips ingredient guide

How it works in skincare

In cosmetics and skincare, coumarin functions primarily as a fragrance component rather than an active skincare ingredient. It blends beautifully with other scent notes to create sophisticated, long-lasting perfumes and adds a soft, powdery sweetness to body and hair products. Formulators value it for its excellent fixative properties that help anchor more volatile fragrance ingredients, ensuring the scent lasts longer on skin and hair.

Key benefits

  • Adds a pleasant sweet, hay-like fragrance to products
  • Acts as a natural fixative to improve scent longevity
  • Enhances the overall sensory experience of skincare and haircare
  • Provides a warm, comforting aroma in perfumes and lotions
  • Blends well with floral, citrus and oriental fragrance families
  • Used at safe, regulated levels in UK and EU cosmetic formulations

Best for

all skin types, sensitive skin, normal skin

Where it comes from

Coumarin is naturally found in many plants including tonka beans, sweet clover, lavender, cassia and cinnamon. It is usually obtained through solvent extraction or steam distillation from these botanical sources before being purified for use in fragrance.

Products with Coumarin

Not every product on UK Lips lists a full ingredient breakdown — so there may be many more formulas that contain Coumarin than we can show here. These are the comparisons where we’ve confirmed it in the listed ingredients.

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