Off topic here,but I though people should know this info. This applies to cassia only not true cinnamon which is a related species and has only trace amounts of coumarin. Most cinnamon sold in stores is cassia unless it's mexican imported then it's likely Cinnamomum verum.

European health agencies have warned against consuming high amounts of cassia bark, one of the four species of cinnamon, because of its coumarin content. According to the German Federal Institute for Risk Assessment, 1 kg of (cassia) cinnamon powder contains approximately 2100 to 4400 mg of coumarin. Powdered Cassia Cinnamon weighs 0.56 g/cc; therefore, 1 kg of Cassia Cinnamon powder is equal to 362.29 teaspoons (1000 g divided by 0.56 g/cc multiplied by 0.20288 tsp/cc). This means 1 teaspoon of cinnamon powder contains 5.8 to 12.1 mg of coumarin, which may be above the Tolerable Daily Intake for smaller individuals. However, it is important to note that the German Federal Institute for Risk Assessment only cautions against high daily intakes of foods containing coumarin. Chamomile, a common herbal tea, also contains coumarin.