From the opinion of the European Food Safety Authority adopted on 12 November 2009 read in combination with that of 16 April 2008 it results that copper chelate of hydroxy analogue of methionine does not have an adverse effect on animal health, human health or the environment. According to the opinion of 16 April 2008, the use of that preparation may be considered as a source of available copper and fulfils the criteria of a nutritional additive for all animal species.
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:104:0031:0033:EN:PDF