The toxicity of tonka beans, which are used for their vanilla-like flavor, is well documented. In low, chronic doses, the coumarin in tonka beans slowly destroys your liver.
It is widely prohibited for use in foods, though it still shows up.
If you are considering using it in tobacco preparations, you might want to read this interesting article from the BBC.
http://www.bbc.com/future/story/20170620-the-delicious-flavour-with-a-toxic-secret
Bob
It is widely prohibited for use in foods, though it still shows up.
If you are considering using it in tobacco preparations, you might want to read this interesting article from the BBC.
http://www.bbc.com/future/story/20170620-the-delicious-flavour-with-a-toxic-secret
Bob