Cinnamon bark is widely used as a spice. It is principally employed in cookery as a condiment and flavouring material, being largely used in the preparation of some kinds of desserts, chocolate, spicy candies, tea, hot cocoa and liqueurs. In the Middle East, it is often used in savoury dishes of chicken and lamb. In the United States, cinnamon and sugar are often used to flavour cereals, bread-based dishes, and fruits, especially apples; a cinnamon-sugar mixture is even sold separately for such purposes. Cinnamon can also be used in pickling. Cinnamon bark is one of the few spices which can be consumed directly.
In medicine it acts like other volatile oils and once had a reputation as a cure for colds. It has also been used to treat diarrhea and other problems of the digestive system. Cinnamon is high in antioxidant activity (PMID 16190627, PMID 10077878). The essential oil of cinnamon also has antimicrobial properties (PMID 16104824), which aid in the preservation of certain foods.