As always be careful. Cassia contains toxins as well and....
In supermarkets in the United States all of the powdered cinnamon sold is actually cassia. Due to a toxic component called coumarin, European health agencies have recently warned against consuming high amounts of cassia, .(2) This is contained in much lower dosages in Cinnamomum burmannii due to its low essential oil content. Coumarin is known to cause liver and kidney damage in high concentrations. True Ceylon cinnamon has negligible amounts of coumarin.