Coumarin is a fragrant organic compound found in many plants, particularly in the tonka bean, sweet clover, and cinnamon. It has a sweet, vanilla-like aroma and is used in perfumes, flavorings, and as a fragrance in cosmetics. Coumarin is also studied for its potential health benefits, including anti-inflammatory and anticoagulant properties. However, it can be toxic in high doses, leading to liver damage. Its presence in food is regulated in some countries due to safety concerns.