Overview
Cinnamon bark comes from several related Cinnamomum tree species, with two main types dominating the market: Ceylon cinnamon (Cinnamomum verum, "true cinnamon") from Sri Lanka and Cassia cinnamon (Cinnamomum cassia/aromaticum) from China, Indonesia, and Vietnam. Both contain cinnamaldehyde as the primary aromatic compound, but differ significantly in coumarin content—a naturally occurring compound that can be problematic in high doses. Ceylon is preferred for supplementation due to much lower coumarin levels. Used for thousands of years for flavor, preservation, and metabolic wellness.