Why Coumarin Is Bad?

Animal studies have shown that eating too much coumarin, which is abundant in Cassia cinnamon, may increase the risk of certain cancers ( 3 ). For example, studies in rodents have found that eating too much coumarin can cause cancerous tumors to develop in the lungs, liver, and kidneys (8, 9, 10 ).

Is coumarin toxic to humans?

The mechanism of coumarin-induced tumour formation in rodents is associated with metabolism-mediated, toxicity and it is concluded that exposure to coumarin from food and/or cosmetic products poses no health risk to humans.

What are the benefits of coumarin?

One of the current coumarin uses includes the synthesis of anticoagulant drugs like warfarin and Coumadin. Coumarin has been shown to reduce inflammation, prevent the buildup of lymph fluid under the skin and increase levels of antithrombin, a protein involved in blood clotting.