Don’t know if you seen this. Might be of interest.
Black Licorice: Trick or Treat?
http://www.freerepublic.com/focus/f-chat/3601032/posts
Yes! I used to have an older friend who loved licorice, and I had heard of that, and mentioned it to her when she developed heart trouble.
(Fortunately, she lived about 25 years past her bypass surgery ;-)