Coumarin ek natural aromatic compound hai jo cosmetics mein fragrance aur masking agent ke taur par use hota hai. Iska sweet, hay-like scent bahut accha lagta hai. Yeh 26 fragrance allergens mein se ek hai jo EU regulations ke under declare karna padta hai packaging par. Sensitive skin waale log ke liye isse avoid karna better ho sakta hai kyunki allergic reaction ho sakte hain.