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Coumarin Toxicity

The toxicity of coumarin, a naturally occurring compound found in cassia cinnamon, and its link to liver damage and tumor formation in rodents.

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Feb 1, 2026
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What are the safety concerns about long‑term cinnamon supplementation (coumarin exposure) and how do Ceylon and cassia cinnamon differ?

raises safety questions because cassia cinnamon commonly contains high levels of the naturally occurring compound coumarin, which regulatory bodies link to at sustained doses above a tolerable daily i...