Overview "Frequently Asked Questions about coumarin in cinnamon and other foods"

Can too much coumarin damage health?

From the use of coumarin in the medicinal field, it is common knowledge that relatively low doses can already cause liver damage in a small group of particularly sensitive individuals if the medicinal products are administered over a few weeks. In minor cases this leads to an elevation of liver enzymes in blood, in severe cases to inflammation of the liver which manifests as jaundice. The exact mechanism of action is not known but the effects are reversible.