In cinnamon the fragrant substance a coumarin, capable to harm to a liver contains. German researchers have made experiments, in which result it became clear that the coumarin maintenance variously not only in cinnamon from different districts, but also from the same tree. Cinnamon traditionally name the dried bark of the various trees growing in basic in Asia. Depending on an origin distinguish the Ceylon and Chinese cinnamon. Thus in the Chinese cinnamon of a coumarin contains in 18 times more, rather than in cinnamon Ceylon. In a powdery condition this difference increases to 63 times! But that the most interesting, the coumarin maintenance variously even in a bark of the same tree! Scientists warn that the coumarin use can lead to liver damage, absolutely asymptomatic for the person. Therefore it is necessary to limit the cinnamon use, especially during Christmas time.