How much cinnamon can you safely eat?
There are two common types of cinnamon in stores. The scientific name is usually listed on the nutrition label of the package.
Cassia cinnamon is the most common type of cinnamon sold in stores. It comes from China and has slightly different properties from Ceylon cinnamon. Ceylon cinnamon is from Sri Lanka and is also known as “true cinnamon.” It is the healthiest type of cinnamon and more expensive. The main difference between these two types of cinnamon is the presence of coumarin, used for flavor. Cassia cinnamon contains coumarin (about 7–18 milligrams per teaspoon) and Ceylon cinnamon does not. Research has shown that some people are sensitive to high doses of coumarin, suggesting it could cause liver damage.