Caffeic acid is a natural organic compound found in various plants, particularly in those belonging to the family Rosaceae. It belongs to the group of phenolic acids and has antioxidant properties. Caffeic acid can be found in coffee, tea, chocolate, berries such as strawberries and blueberries, and some vegetables like broccoli and Brussels sprouts. It is also used as a food additive to enhance the flavor of certain products.