The European Food Safety Authority （‘the Authority’） concluded in its opinions of 7 March 2012 （2） and 28 October 2014 （3） that, under the proposed conditions of use, the preparation of benzoic acid, thymol, eugenol and piperine does not have an adverse effect on animal health, human health or the environment, and that it has a potential to improve feed to gain ratio in chickens for fattening. It also considered that this conclusion could be extended to chickens reared for laying. Since the mode of action can be assumed to be the same in all poultry species, this conclusion can be extrapolated to include the minor poultry species for fattening and reared for laying. The Authority does not consider that there is a need for specific requirements of post-market monitoring. It also verified the report on the method of analysis of the feed additive in feed submitted by the Reference Laboratory set up by Regulation （EC） No 1831/2003.