Ractopamine is authorized in Canada per the article you linked.
Generally I look at EU for what's good/bad to consume though. It's scary how much stuff is banned there that's in everyday US products.
"European Union’s Parliament and Council, the bloc’s governing body, reached a provisional deal in December to “simplify” the process for marketing plants bred through new genomic techniques, such as by scrapping the need to label them any differently from conventional ones."