Cinnamon is a delicious addition to many dishes and has numerous health benefits as well. Cassia cinnamon is often called cinnamon, though it is actually not pure cinnamon. Its uses, flavor, aroma, and benefits are also similar. However, cassia cinnamon contains one thing that pure Ceylon cinnamon does not. That is coumarin. This is a chemical compound that, in large quantities, is linked to liver damage.