There is a toxic threshold for cinnamon consumption
the verdict
SUPPORTED
the evidence backs this
confidence 85/100
Cassia cinnamon contains significant levels of coumarin, a compound with a well-established tolerable daily intake threshold above which potential hepatotoxicity and adverse health effects can occur.
Evidence for · 3
Relative bioavailability of coumarin from cinnamon and cinnamon‐containing foods compared to isolated coumarin: A four‐way crossover study in human volunteers
2010 · cited by 44
Discusses how heavy consumption of Cassia cinnamon can lead to doses exceeding the tolerable daily intake (TDI) of coumarin.
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More for · 2
The content of coumarin in the commercial samples of cinnamon bark and cinnamon-containing dietary supplements available on the Serbian market
2020 · cited by 5
Notes that certain cinnamon species contain high levels of coumarin, which is potentially hepatotoxic and requires limits on consumed amounts.
Coumarin in grounded cinnamon and teas containing cinnamon - extraction and determination by HPLC method
2021 · cited by 2
States that while optimal consumption of cinnamon components like coumarin has health benefits, increased long-term consumption leads to adverse health effects.