I just used some Grade B Maple syrup for a couple of bacon projects, so I found this article to be interesting (and disturbing).
http://www.huffingtonpost.ca/2012/02/24/fake-maple-syrup-bernard-coleman_n_1299881.html
http://www.huffingtonpost.ca/2012/02/24/fake-maple-syrup-bernard-coleman_n_1299881.html