Cinnamon

Also known as cinnamomum, ceylon cinnamon, cassia cinnamon.

Last reviewed October 9, 2026 · Jump to references

What is Cinnamon?

In plain words

Cinnamon is a spice made from the inner bark of certain trees. The body breaks down and clears its natural compounds after they are eaten. Researchers study whether it affects blood sugar and inflammation, but human studies have not established it as a reliable treatment for diabetes. Cassia cinnamon generally contains more coumarin, a natural substance that can harm the liver with high or prolonged exposure.

Technical definition

Cinnamon is a botanical preparation derived from the inner bark of Cinnamomum species, including C. verum (Ceylon cinnamon) and several species marketed as cassia; it contains cinnamaldehyde, polyphenols, and variable amounts of coumarin. Its constituents affect multiple biochemical pathways rather than one established therapeutic receptor, with laboratory research examining insulin signaling, glucose metabolism, and inflammatory pathways. Cinnamon is sold as a food spice and dietary supplement, but it is not FDA-approved to treat disease.

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Evidence by use

Each use is rated on its own. There is no single overall effectiveness score.