participates in has role is related to material entity material entity food component food component entity ENPADASI_WP4 Any substance that is distributed in foodstuffs. It includes materials derived from plants or animals, such as vitamins or minerals, as well as environmental con-taminants. Concept of food component can be viewer both as a role and as a material entity. This class, for convenience, represents the material entity "food component", including all those material entity having the role of "Food Component" food food component absorption food component metabolization