(12)Where vitamins, minerals or other substances used in accordance with Directive 2002/46/EC, Regulation (EC) No 1925/2006 or Regulation (EU) No 609/2013 result from a production process not used for food production within the Union before 15 May 1997, which gives rise to significant changes in the composition or structure of a food, affecting its nutritional value, metabolism or level of undesirable substances, or where those vitamins, minerals or other substances contain or consist of engineered nanomaterials, they should also be considered novel foods under this Regulation and should be re-assessed first in accordance with this Regulation and subsequently in accordance with the relevant specific legislation.