Dr. Leana Wen: Cinnamon is a spice that comes from the dried bark of Cinnamomum trees. The most common type of cinnamon sold in North America is Cassia cinnamon from the Cinnamomum aromaticum ...

Cinnamon is a spice created from the inner bark of the Cinnamomum tree. Strips of the inner bark are dried until they curl into rolls known as cinnamon sticks or quills. These can then be ground ...

Several different species from the genus Cinnamomum supply the world’s cinnamon. Most of so-called "true" cinnamon, or Ceylon cinnamon, comes from Cinnamomum verum trees grown in Sri Lanka.