(11)The distinction between feed materials, feed additives, and other products such as veterinary drugs has implications for the conditions for the placing of such products on the market. Feed materials are primarily used to meet animals’ needs, for example for energy, nutrients, minerals or dietary fibres. They are usually not chemically well-defined except for basic nutritional constituents. Effects which can be justified by scientific assessment and which are exclusive to feed additives or veterinary drugs should be excluded from the objective uses of feed materials. It is, therefore, appropriate to draw up non-binding guidelines for distinguishing between these kinds of products. In duly justified cases, the Commission should be empowered to clarify whether a product constitutes feed for the purposes of this Regulation.